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]: Fluoroscopy has ____ magnification modes and image capture.\Question: Choose the right answer from options given a) zero b) two c) nine d) eight
[EX A]: b

[EX Q]: Water weighs about ____ pounds per gallon.\Question: Choose the right answer from options given a) seven b) ten c) zero d) nine
[EX A]: b

[EX Q]: Sulphur comes in several varieties, such as rings of six, seven, ____ and ten atoms.\Question: Choose the right answer from options given a) eight b) nine c) two d) ten
[EX A]:
a