What is the correct answer?

4

A. 30

B. 36

C. 40

D. 46

108 = 2^{2} x 3^{3}, 288 = 2^{5} x 3^{2 }and 360 = 2^{3 }x 5 x 3^{2}.

H.C.F. = 2^{2 }x 3^{2 }= 36.