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:
Argentine ants are able to establish new colonies with as little as ____ worker ants and one queen.\Question: Choose the right answer from options given a) no b) two c) ten d) five

Ex Output:
c


Ex Input:
Poisons come in ____ different forms .\Question: Choose the right answer from options given a) four b) no c) five d) ten

Ex Output:
a


Ex Input:
Children also require ____ further amino acids, histidine and arginine.\Question: Choose the right answer from options given a) nine b) four c) two d) five

Ex Output:

c