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').
--------
Question: Most people have ____ kidneys.\Question: Choose the right answer from options given a) two b) five c) seven d) six

Answer: a

Question: Many tortoises can retract their head, their ____ limbs and tail into the shell for protection.\Question: Choose the right answer from options given a) no b) one c) two d) four

Answer: d

Question: Inhibited desire is the most common sexual dysfunction, effecting ____ in three couples.\Question: Choose the right answer from options given a) eight b) zero c) one d) no

Answer:
c