Question Discussion & Solution

The correct answer is the Graphical User Interface.

Important Points

• Graphical User Interface (GUI) 
  • The graphical user interface is used by most of the commercially popular computer operating systems.
  • A Graphical User Interface (GUI) allows you to enter commands by pointing and clicking at objects that appear on the screen.
  • It consists of picture-like items (eg. icons and arrows).
  • In most operating systems, the primary user interface is graphical.

Key Points

• Some popular, modern graphical user interface examples include:
  • Microsoft Windows,
  • macOS, Ubuntu Unity,
  • GNOME Shell for desktop environments, and
  • Android,
  • Apple's iOS,
  • BlackBerry OS,
  • Windows 10 Mobile,
  • Palm OS-WebOS, and
  • Firefox OS for smartphones.​

The correct answer is Concave lens.

Key Points

• To treat the eye disease known as myopia or nearsightedness we use the Concave Lens.
• A concave lens is a category of lens that deviates a straight light beam coming from the origin to a diminished, upright, virtual image.
• It can construct both real and virtual images.
• The convex lens is a lens that tends to meet at a point of rays of light that convey parallel to its principal axis which is comparatively thick across the middle and thin at the lower and upper edges.
• A convex lens is used in cameras, correction of Hyperopia, etc.
• Bifocal lenses hold two different prescriptions, an upper part to allow for distance vision and an additional power on the bottom part of the lens to help in close-up focus.
• A bifocal lens is used in people suffering from presbyopia, myopia, hyperopia, and astigmatism.
• The result is eyesight lucidity at both distance and near with one pair of glasses.
• A Compound lens is simple lenses made on a general axis usually in close proximity and often cemented with each other.

Additional Information

Least possible diagram is:

I. Some nice are rich → True

II. Some bad are nice → False (Possible but not definite)

III. All poor are nice → False (Possible but not definite)

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

The correct answer is Daulatmal Bhandari.

• Daulatmal Bhandari formed the 'Praja Mandal' in Jaipur.

Key Points

• Daulatmal Bhandari :
  • He was Chief Justice of Rajasthan High Court.
  • He was also a Member of the First Lok Sabha from 1952 to 1955
  • He formed the Azad Morcha in Jaipur and took satyagraha in 1942.
  • He also organized ‘Praja Mandal’ in Jaipur State.
  • Daulatmal Bhandari served as the Development and Agriculture Minister in Rajasthan state.

Additional Information

• Ram Kinkar was a member of the Uttar Pradesh Legislative Assembly.
• Vitthal Baburao Tupe was a Member of the Twelfth Lok Sabha.