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:
Most infected persons have ____ symptoms of disease.\Question: Choose the right answer from options given a) six b) no c) three d) one

Ex Output:
b


Ex Input:
Potassium helps maintain fluid regulation and normal pH. All ____ help normalize.\Question: Choose the right answer from options given a) three b) six c) two d) one

Ex Output:
a


Ex Input:
Suckling becomes less frequent when the calf is about ____ months old.\Question: Choose the right answer from options given a) two b) three c) one d) six

Ex Output:

d