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]: Carnations grow well in a garden spot that receive ____ to five hours of sunlight per day.\Question: Choose the right answer from options given a) eight b) three c) one d) four
[EX A]: d

[EX Q]: Most children improve in three to ____ days.\Question: Choose the right answer from options given a) seven b) six c) four d) ten
[EX A]: a

[EX Q]: ABA is an is a terpenoid and contains ____ isoprene units.\Question: Choose the right answer from options given a) two b) no c) five d) three
[EX A]:
d