- 23
- 28
- 25
- 27

Answer: Option 2

Explanation:

Required sum = (2 + 3 + 5 + 7 + 11) = 28. Note: 1 is not a prime number. Definition For PrimeNumber: A prime number (or a prime) is a natural number that has exactly two distinct natural number divisors: 1 and itself.

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