Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Ex Input:
Some people try to count to ____ when they feel angry.\Question: Choose the right answer from options given a) no b) ten c) seven d) five

Ex Output:
b


Ex Input:
Angiosperms inhabit all ____ continents, as well as the oceans.\Question: Choose the right answer from options given a) five b) seven c) three d) zero

Ex Output:
b


Ex Input:
Fire requires ____ components, fuel, ignition and oxygen.\Question: Choose the right answer from options given a) nine b) no c) three d) ten

Ex Output:

c