Select the odd group of numbers. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g.13 – Operations on 13 such as adding /subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

Correct option is A

a) (17-51-147) → 17×3 = 51, 51×3=153 ≠147
b) (10-30-90)=10×3=30, 30×3=90
c) (15-45-135)=15×3=45, 45×3=135
d) (22, 66, 198)=22×3=66, 66×3=198
Ans option a is different from rest.