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:
Cattle are the second most important commodity in ____ states and third in six states.\Question: Choose the right answer from options given a) nine b) five c) no d) eight

Ex Output:
a


Ex Input:
Nodes are points in space that have ____ probability for locating an electron there.\Question: Choose the right answer from options given a) no b) six c) zero d) three

Ex Output:
c


Ex Input:
Menstrual uncleanness lasts for ____ days.\Question: Choose the right answer from options given a) five b) four c) one d) seven

Ex Output:

d