Answer: D) Carbondioxide Explanation: 72% of the totally emitted greenhouse gases is carbon dioxide.   Hence, Carbon dioxide (Co2) is predominantly responsible for Global warming.

Answer: A) Excellence in sports Explanation: The Arjuna Awards are given by the Ministry of Youth Affairs and Sports, Government of India to recognize outstanding achievement in sports. Started in 1961, the award carries a cash prize of ₹ 500,000, a bronze statue of Arjuna and a scroll.

Answer: A) discourage producers from taking harmful actions. Explanation: Government regulation protects constitutional rights, safety, and fairness.   Hence, Government regulation is intended to discourage producers from taking harmful actions.

Answer: B) 3.5% Explanation: Seawater or salt water is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of approximately 3.5% or 35 parts per thousand. This means that for every 1 litre (1000 mL) of seawater there are 35 grams of salts dissolved in it.   Hence, The average salinity of seawater is 3.5%.

We know that 1 yard = 3 feet.    A yardstick which is used for measurement has 3 feet long but it cannot walk.

Answer: B) Book Explanation: A book has a spine to hold all the pages, but it has no bones.

Answer: C) Antarctica Explanation: Africa - 54 countries South America - 12 countries Antarctica - 0 countries Europe - 43 countries.   Hence, Antarctica continent has the least countries.

Answer: C) Letters Explanation: We know that, a folder holds documents in the same way an envelope holds letters.   Hence, Folder : Document :: Envelope : Letter.