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Prime numbers that differ by two are called twin primes

which of the following pairs are twins primes
A,3 and 5 B 13 and 17 C 5and7 ​

User Pierina
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A is your answer
Two prime numbers are called twin primes if there is present only one composite number between them. Or we can also say two prime numbers whose difference is two are called twin primes. For example, (3,5) are twin primes, since the difference between the two numbers 5 – 3 = 2.
User Lizelle
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