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: Collars come in ____ shapes.\Question: Choose the right answer from options given a) six b) two c) four d) zero

SOLUTION: b

PROBLEM: Alleles fall into ____ classes based on somatic, gonadal and dauer phenotypes.\Question: Choose the right answer from options given a) ten b) six c) eight d) no

SOLUTION: b

PROBLEM: Pups are weaned at about ____ to eight weeks of age.\Question: Choose the right answer from options given a) five b) six c) three d) one

SOLUTION:
a