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:
Pelicans use ____ different ways to feed.\Question: Choose the right answer from options given a) no b) nine c) one d) two

Ex Output:
d


Ex Input:
Some families have two daddies or ____ mommies.\Question: Choose the right answer from options given a) nine b) seven c) zero d) two

Ex Output:
d


Ex Input:
Ordinary matter comes in ____ forms.\Question: Choose the right answer from options given a) five b) three c) eight d) nine

Ex Output:

a