Q. Choose the one which is different from the rest three.

  • (A) 21
  • (B) 69
  • (C) 81
  • (D) 83
βœ… Correct Answer: (D) 83
Explanation: 83 is the only prime number in the group.
Explanation by: Priyanka Tomar
83 is the only prime number in the group.

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