Questions

The most number of countries are in the continent Africa. Eventhough, Asia is the biggest continent in its size, Africa is the continent with 54 countries whereas Asia have 48 countries.

BEML - Bharat Earth Movers Limited is the PSU which had received 'Top Challengers' and 'Best Mining Equipment Seller Award' recently for the year 2017 - 2018. 

The 1st country in Asia to legalise same-sex marriage is Taiwan.

On December 21, the earth is in an equivalent position on the opposite points in its orbit, So the South pole is tipped towards the sun and North pole away from it resulting in 24 hours of darkness at the North pole, as the sun is overhead on the Tropic of Capricorn. This phenomenon is winter solstice; while on June 21, North pole is tipped towards the Sun but the South pole is tipped away from the sun resulting in 24 hours of darkness on the South Pole, as the sun is overhead on the Tropic of Cancer.This phenomenon is summer solstice; while Aphelion is the position of the earth in its orbit when it is at its distant point from the sun.

A modem is a hardware device which performs both modulation and demodulation. MODEM means (Modulator-Demodulator).

Group 1 metals are also called as alkali metals with reactive in nature and low melting points. They are soft and produce hydrogen and alkaline metal hydroxide solution when they react with water.

Ans. A.
‘in to’ is the wrong usage of preposition.
ii- ‘onto’ is the wrong usage of preposition.
iii- ‘Who’ is a redundant word and distorts the meaning of the statement. .
‘puts at’ makes the sentence correct.