Select the correct code regarding total number of space isomers for the following compounds:
(I) `[Ma_(3)b_(2)c]^(n+-)`
(II) `[M(AB)_(3)]^(n+-)`
(III) `[Ma_(2)b_(2)c_(2)]^(n+-)`

Options

A. (I)-4,(II)-4,(III)-6
B. (I)-4,(II)-3,(III)-5
C. (I)-3,(II)-3,(III)-5
D. (I)-3,(II)-4,(III)-6

Answer

D

Explanation

`implies`All are optically inactive, No. of stereoisomers=3

`implies ` Both are optically active, No of stereoisomers=4
(III)
`implies `No. of stereoisomers=6