SOME EQUATIONS ARE SOLVED ON THE BASIS OF A CERTAIN SYSTEM. FIND THE CORRECT ANSWER FOR THE UNSOLVED EQUATION ON THAT BASIS. ? A ). 1 X 3 X 5 = 531, B ). 2 X 7, 9 = 972, C ). 4 X 6 X 8 = ? D ) 3 X 5 X 7 = 753