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:
Most spiders have ____ eyes and eight legs.\Question: Choose the right answer from options given a) eight b) five c) no d) three

Ex Output:
a


Ex Input:
Betalamic acid has then the choice of ____ fates.\Question: Choose the right answer from options given a) seven b) three c) five d) two

Ex Output:

d