Product of two co-prime numbers is 117. Then their LCM is :

[A]9

[B]13

[C]39

[D]117

**117**

HCF of two prime numbers = 1

∴ Product of numbers = 117 (Their LCM)

117 = 13 9 where 13 & 9 are co-prime.

LCM (13, 9) = 117.

Hence option [D] is correct answer.