Find the L.C.M. of 72, 108 and 2100.	Choose the correct choice from the following:
A) 37800	B) 37600	C) 37200	D) 37500	E) None of them
72 = 2^3 x 3^2, 108 = 3^3 x 2^2, 2100 = 2^2 x 5^2 x 3 x 7.   L.C.M. = 2^3 x 3^3 x 5^2 x 7 = 37800.   37800nswer is 37800.
<result>A</result>
Find the L.C.M. of 72, 108 and 2100.