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:
Many soils have ____ major layers or horizons, top soil, subsoil and parent material.\Question: Choose the right answer from options given a) one b) two c) seven d) three

Ex Output:
d


Ex Input:
Stringers consist of ____ narrow pieces of wood glued together.\Question: Choose the right answer from options given a) ten b) three c) five d) seven

Ex Output:
b


Ex Input:
Whole corn can sustain the virus up to ____ days.\Question: Choose the right answer from options given a) seven b) one c) four d) nine

Ex Output:

c