Find the odd number / letters / word from the given alternative:

The answer is D. 304 : 16.

In each of the other options, the second number is the product of the first number and the sum of its digits.

• 117 : 13
  117 = 3 * 3 * 13

• 162 : 18
  162 = 2 * 3 * 3 * 13

• 171 : 19
  171 = 19 * 9

• 304 : 16
  304 = 2 * 2 * 2 * 3 * 13

However, 304 is not the product of 30 and 16.