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: Urea cycle requires the coordination of ____ different tissues.\Question: Choose the right answer from options given a) two b) four c) nine d) zero

SOLUTION: a

PROBLEM: Mosquitoes have three body parts and ____ legs.\Question: Choose the right answer from options given a) two b) nine c) six d) eight

SOLUTION: c

PROBLEM: Cords comprise ____ insulated wires, joined at the middle.\Question: Choose the right answer from options given a) two b) five c) eight d) seven

SOLUTION:
a