Question Discussion & Solution

The correct answer is Stapes.

• Stapes is the smallest bone in the human body.

Key Points

• The smallest bone in the human body is called stapes, located in the middle ear.
• The size of the staples is 3mm × 2.5 mm. 
• There are three bones in the middle ear, ​Malleus, Stapes, and Incus.
• ​The Stapes is the smallest of the three bones and it looks like a bell.​
• It is the innermost bone of our auditory ossicles in the middle ear, which are responsible for transmitting sound waves from the air outside to the fluid-filled labyrinth (cochlea).

​
Additional Information

• The malleus or hammer is a hammer-shaped small bone or ossicle of the middle ear which connects with the incus and is attached to the inner surface of the eardrum.
  • The word is Latin for hammer or mallet.
  • It transmits the sound vibrations from the eardrum to the incus.
• The incus, also known as the “anvil,” is the middle of three small bones in the middle ear.
  • The incus transmits vibrations from the malleus to the stapes.
• In anatomy, the scapula (plural scapulae or scapulas), also known as the shoulder bone, shoulder blade, wing bone, or blade bone,
  • It is the bone that connects the humerus (upper arm bone) with the clavicle (collar bone).
• The rib cage is the arrangement of ribs attached to the vertebral column and sternum in the thorax of most vertebrates that encloses and protects vital organs such as the heart, lungs, and great vessels.
• The hip bone (os coxae, innominate bone, pelvic bone, or coxal bone) is a large irregular bone, constricted in the center and expanded above and below. In some vertebrates (including humans before puberty).
• it is composed of three parts: the ilium, ischium, and the pubis.

Concept:

In magnetic compass, a magnetic needle which always directs the North-South direction.

• The compass is an instrument used for navigation and orientation that indicates position relative to the geographical directions (or points).
• Typically, a diagram called a compass rose displays the directions to the north, south, east, and west on the compass face.

Elements of Earth's Magnetic Field:

• The magnitude and direction of the magnetic field of the earth at a place are completely given by certain quantities known as magnetic elements.

Explanation:

Earth has its own magnetic field whose poles are

• Magnetic North is in Geographical South pole.
• Magnetic South is in Geographical North Pole.
• A compass needle is a bar magnet with a pointed north pole. It is attracted to the magnetic south pole.
• Hence magnetic needle points in North Direction (Magnetic South). 

The correct answer is Vitamin B1.

Key Points

• When rice is produced and not polished it is called brown rice. 
• Brown rice is rich in Vitamin B1. 
• When brown rice is polished, rice loses many vitamins and minerals including Vitamin B1 through the bran.
• Vitamin B1 also called thiamine is an essential vitamin, a deficiency of which is known to cause beriberi.

Additional Information

Ammeter is an instrument used to measure Current.

Similarly, Hygrometer is an instrument used to measure Humidity

Key Points

• Protection of Women from Domestic Violence Act, 2005:
  • Domestic Violence means:
    • “Physical abuse" includes hurt of any kind. Assault, criminal intimidation and criminal force. Hence statement 1 is correct.
    • “Sexual abuse" such as the conduct of a sexual nature such as forced sexual intercourse, forcing the aggrieved person to watch pornography or other obscene material
    • “Verbal and emotional abuse" such as Accusation/aspersion on character or conduct. An insult for not bringing dowry, Insult for not having a male child. Hence statement 2 is Correct.
    • "Economic abuse" such as not providing money for maintaining a woman or her children. Not providing food, clothes, medicine. etc, Forcing woman out of the house. Hence statement 4 is Correct.
  • Non-sharing of household work, noncaring attitude for children, unhealthy habits of living. late coming etc. (of the male partner) is not directly covered under this act. Hence Statement 3 is Incorrect.