Identification of `+m` & `-m` groups : If the first atom of the group has lone pair or negative charge shows `+m` effect. `+m` group increases electron density at ortho and para position of benzene ring. If the group has vacant `p-`orbital on first atom, also a multipal bonded group in which second atom is more electronegative than the first then it shows `-m` effect. `-m` group decreases electron density of ortho and para position of benzene ring.
Which of the following compound/s have more electron density than

Options

A.
B.
C.
D.

Answer

A, B, D

Explanation

have more `+m` effect
than