 
<translate> (A+B) 1 ụbọchị ọrụ = 1/4 Ọrụ A rụrụ n'otu ụbọchị = 1/12 B's 1 day work = 1/6 Ya mere azịza ya bụ (A). <eng> (A+B)'s 1 day work = 1/4
A's 1 day work = 1/12
B's 1 day work = 1/6 So the answer is (A). 