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:
Hypertension affects nearly one in ____ adults.\Question: Choose the right answer from options given a) three b) seven c) five d) zero

Ex Output:
a


Ex Input:
All butterflies go through ____ life stages .\Question: Choose the right answer from options given a) one b) four c) zero d) five

Ex Output:
b


Ex Input:
Most Screech owls have from ____ to six young.\Question: Choose the right answer from options given a) four b) no c) seven d) six

Ex Output:

a