General Knowledge and Current Affairs

(c) Neptune

Of the four options, Neptune is the coldest: it is the farthest planet from the Sun, with an average temperature of about −214 °C. Jupiter is much warmer, Mercury is close to the Sun, and Earth is warm enough to support life. (Strictly, Uranus, at about −224 °C, is the coldest planet in the solar system, but it is not among the options.)

(d) Marie Curie

Marie Curie discovered the radioactive elements polonium and radium in 1898 while working with her husband Pierre Curie; she won Nobel Prizes in both Physics (1903) and Chemistry (1911).

(c) Dr. Ram Baran Yadav

Ram Baran Yadav (a physician, hence "Dr.") was elected by the Constituent Assembly and became the first President of the Federal Democratic Republic of Nepal on 23 July 2008, after the monarchy was abolished. Bidhya Bhandari was the second President (and the first woman President), while KP Sharma Oli has served as Prime Minister.

(c) Salt used in kitchen

Sodium chloride (NaCl) is the common salt used in the kitchen. Washing soda is sodium carbonate decahydrate (Na₂CO₃·10H₂O) and baking soda is sodium hydrogen carbonate (NaHCO₃), so neither matches.

(a) They behave more patiently with children

Women are generally considered better teachers at the primary level because they tend to be more patient, caring and affectionate with small children, which suits the needs of young learners. The other options are either discriminatory or not valid professional reasons.

(b) Remote control

Eugene Polley, an engineer at Zenith Radio Corporation, invented the first wireless television remote control — the "Flash-Matic" — in 1955. It used a flashlight-like device to aim a beam of light at photocells on the TV set.

(a) Karnali

The Karnali is the longest river in Nepal, flowing about 507 km within the country. The Koshi carries the greatest volume of water but is shorter.

None of the options fits, because "integrity" is an abstract quality (honesty and strong moral principles), not a gram, an animal, a game or a fruit. The question as printed is probably misworded or its options are incomplete, so check it against the source paper. If an option must be chosen, none can be justified; the correct category would be "virtue" or "value".