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]: Decapod crustaceans have ____ pairs of limbs.\Question: Choose the right answer from options given a) five b) four c) six d) seven
[EX A]: a

[EX Q]: Laparoscopic surgery is performed via three or ____ small incisions in the abdomen.\Question: Choose the right answer from options given a) nine b) six c) five d) four
[EX A]: d

[EX Q]: Gadolinium oxide adopts ____ structures.\Question: Choose the right answer from options given a) no b) two c) six d) three
[EX A]:
b