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If a and b be two co-prime numbers, then...

If a and b be two co-prime numbers, then `(a+b) and (a-b)`:

A

are always co-primes

B

have atleast one common factor other than 1

C

if(a+b) or (a-b) is not a prime number then their HCF is 2

D

none of the above

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The correct Answer is:
C
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