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Which of the following pairs is a pair of twin prime numbers?
A(43, 47)
B(3, 7)
C(71, 73)
D(37, 41)
Answer & Solution
Correct answer: C. (71, 73)
1. Twin primes are prime numbers that differ by exactly 2.
2. Check pairs: 43 and 47 differ by 4; 37 and 41 differ by 4; 3 and 7 differ by 4.
3. 71 and 73 are both prime and differ by 2, so they are twin primes.
_Source: RRB Group D CEN-02/2018 PYQ, Q.16._