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 Q]: Nematodes occur in ____ general forms.\Question: Choose the right answer from options given a) nine b) two c) seven d) ten
[EX A]: b

[EX Q]: Potential energy is divided into ____ different types of energy.\Question: Choose the right answer from options given a) eight b) three c) zero d) two
[EX A]: b

[EX Q]: Most spiders have ____ eyes, but some have six, four or two.\Question: Choose the right answer from options given a) eight b) six c) nine d) two
[EX A]:
a