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:
Dogs are pack animals, and ____ dogs is the minimum number for proper socialization.\Question: Choose the right answer from options given a) four b) five c) no d) zero

Ex Output:
b


Ex Input:
Conflict diamonds account for less than ____ per cent of world trade in rough diamonds.\Question: Choose the right answer from options given a) two b) four c) one d) ten

Ex Output:
b


Ex Input:
Most spiders have eight eyes, although some have ____ or two.\Question: Choose the right answer from options given a) one b) six c) nine d) four

Ex Output:

b