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:
Ants have ____ noses.\Question: Choose the right answer from options given a) zero b) eight c) five d) three

Ex Output:
c


Ex Input:
Human females have ____ X chromosomes.\Question: Choose the right answer from options given a) two b) six c) one d) eight

Ex Output:
a


Ex Input:
Germs have ____ means of locomotion except to attach themselves to particles of dust.\Question: Choose the right answer from options given a) no b) four c) seven d) zero

Ex Output:

a