Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer

A, B, C, D

Explanation

`to` Planar as both B and N are `sp^(2)`-hybridized
`to mu_(o)=0` (non-polar)
`to` has `2p_(pi)-2p_(pi)` back bonding between B-N bond.
`to` has no co-ordinate bond