Q 2423423341.     Groups each containing `3` boys are to be formed out of
`5` boys-`A, B,C, D` and E such that no one group contains
both `C` and `D` together. What is the maximum number
of such different groups?

IAS 2007 Prelims
A

`5`

B

`6`

C

`7`

D

`8`

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