Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[EX Q]: Oil is the most commonly used source of energy in the world.
[EX A]: What is the most commonly used source of energy in the world?

[EX Q]: In circles way do particles of water move in deep water.
[EX A]: In which way do particles of water move in deep water?

[EX Q]: A double bond consists of one sigma bond and one pi bond.
[EX A]:
What kind of bond consists of one sigma bond and one pi bond?