Question Discussion & Solution

The pattern followed here is:

According to the alphabetical positions of the letters,

Hence, ‘JAK’ is the correct answer.

The Correct Answer is Option 4 i.e Propane.

• Methane:
  • Methane is a colorless odorless gas. 
  • It is also known as marsh gas or methyl hydride. 
  • The molecular formula is CH₄.
• Pentane:
  • Pentane is found in alcoholic beverages. 
  • Pentane is present in hop oil. 
  • Pentane is any or one of the organic compounds with the formula C₅H₁₂. 
  • Its properties are very similar to those of butane and hexane.
• Propane:
  • Propane, sometimes known as liquefied petroleum gas, or LPG.
  • Propane is a three-carbon alkane gas (C₃H₈).
  • Propane is produced as a by-product of natural gas processing and crude oil refining. 
• Butane:
  • Butane is a colorless gas with a faint petroleum-like odor.
  • It is shipped as a liquefied gas under its vapor pressure. 
  • Butane is a straight-chain alkane composed of 4 carbon atoms. 
  • C₄H₁₀ is the molecular formula of butane.

The correct answer is Mr. Bulaki Das Kalla.

• As of June 2020, Mr. Bulaki Das Kalla is the Cabinet Minister of Culture and Archeology in Rajasthan.

Key Points

• Mr. Bulaki Das Kalla's constituency is Bikaner, Rajasthan.
• He is associated with the Indian National Congress.
• He is currently holding the portfolio of Cabinet Minister of Energy, Public Health & Engineering, Ground Water, Art, Literature, Culture & Archeology.

Additional Information

• Mr. Sachin Pilot is the Deputy Chief Minister of Rajasthan.
• Mr. Ashok Gehlot is the Chief Minister of Rajasthan.
• Mr. Shanti Kumar Dhariwal is the Minister of Local Self Government, Urban Development & Housing Department, Rajasthan.

The correct answer is Scanner.

Key Points

• Scanner:
  • Scanner is an input device and can be used to scan images as well as text documents.
  • Scanner is not a pointing input device.
• ​Pointing device
  • A pointing device is an input interface that allows a user to input spatial data to a computer. 
  • Common pointing devices
    • Mouse
    • Trackball
    • Joystick
    • Pointing stick
    • Wii Remote
    • Finger tracking
    • Graphics tablet
    • Stylus
    • Finger tracking

Additional Information

• Track Ball:
  • The trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axes, similar to an upside-down mouse..
  • Tracker balls are commonly used on CAD workstations​
• Digitizing Tablet:
  • A digitizer tablet is a peripheral device that allows users to draw on a computer screen.
• Joystick:
  • A joystick is a lever-type device that can be moved in several directions.
  • Used to control the movement of an image on a computer or similar display screen.

The correct answer is Amir Khusro.

• Amir Khusro was a poet of the fourteenth century.

Key Points

• Amir Khusro (1253 AD-1325 AD):
  • He was a Persian associated with royal courts of more than seven rulers of the Delhi Sultanate.
  • He innovated Khayal (a style of singing).
  • In his book Tarikh-i-Alai, he gave an account of the conquest of Alauddin Khilji.
  • He also lived in the court of Ghiyasuddin Tughlaq and wrote Tughlaqnamah.
  • Khusro is also known as Tuti-i-Hind or ‘Parrot of India’.
• Amir Khusro introduced many Persian Arabic ragas.
• He also invented the Sitar.

Additional Information

• Sarala Dasa was a poet of 15th-century.
  • He was also a scholar of Odia literature.
• Dhurjati was a poet of 15th and 16th centuries.
  • He was a Telugu poet in the court of the king Krishnadevaraya
  • And was one of the astadiggajalu ( "Eight Mighty Elephants "). 
• Pitambar Dvija was 15 and 16th-century poet from Assam.