TASK DEFINITION: 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').
PROBLEM: Interdigital glands are present on all ____ feet, and are slightly larger on the front feet.\Question: Choose the right answer from options given a) three b) five c) four d) eight

SOLUTION: c

PROBLEM: Elephants give birth to ____ calf every four to nine years on average.\Question: Choose the right answer from options given a) ten b) one c) eight d) six

SOLUTION: b

PROBLEM: Vitamins are classified into ____ groups.\Question: Choose the right answer from options given a) two b) one c) eight d) five

SOLUTION:
a