The H.C.F. of two numbers is 28 and the other two factors of their L.C.M. are 12 and 15. The larger of the two numbers is  Choose the correct choice from the following:	A) 420	B) 430	C) 312	D) 322	E) none

Rationale: "solution clearly , the numbers are ( 28 x 12 ) and ( 28 x 15 ) . larger number = ( 28 x 15 ) = 420 . answer a"
Answer: A