Answer :
9(15) = 135
Option A: 9(1 + 5) = 9 + 45 = 54
Option B: 9(10 + 5) = 90 + 45 = 135
Option C: 9(1 + 50) = 9 + 450 = 459
Option D: 9(10 + 50) = 90 + 450 = 540
Hence, the answer is B.
Option A: 9(1 + 5) = 9 + 45 = 54
Option B: 9(10 + 5) = 90 + 45 = 135
Option C: 9(1 + 50) = 9 + 450 = 459
Option D: 9(10 + 50) = 90 + 450 = 540
Hence, the answer is B.