Choose the group which is different from the others:

Correct Option (D)

The group 83, 89, 91, 97 is the one that differs from the others. This is because 91 is a composite number, being the product of 7 and 13 (91 = 7 × 13). In contrast, 83, 89, and 97 are prime numbers.

Incorrect Options:

Options (A), (B), and (C) consist exclusively of prime numbers:

• Option (A): 17, 37, 47, and 97 are all prime numbers.

• Option (B): 31, 41, 53, and 67 are all prime numbers.

• Option (C): 71, 73, 79, and 83 are all prime numbers.

These groups share the characteristic of containing only prime numbers, distinguishing them from Option (D) which includes a composite number.