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').

Kabbalists group the simple letters into ____ triplets.\Question: Choose the right answer from options given a) four b) no c) ten d) three
a

Pods contain less than ____ animals, mainly females with calves and sexually immature males.\Question: Choose the right answer from options given a) zero b) six c) no d) ten
d

Blood contains ____ types of cells - red and white.\Question: Choose the right answer from options given a) four b) one c) two d) six

c