H.C.F. of two numbers is 9 and their L.C.M is 270. If the sum of hte numbers is 99 :

H.C.F. of two numbers is 9 and their L.C.M is 270. If the sum of hte numbers is 99, their difference is equal to
(a) 18
(b) 15
(c) 12
(d) 9