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:
Polyester has ____ favorable properties.\Question: Choose the right answer from options given a) four b) two c) seven d) six

Ex Output:
b


Ex Input:
Most toddlers find it hard to sit still for more than a few seconds, let alone ____ minutes.\Question: Choose the right answer from options given a) no b) three c) four d) zero

Ex Output:
b


Ex Input:
Quarks are grouped into ____ pairs.\Question: Choose the right answer from options given a) three b) two c) zero d) six

Ex Output:

a