Passage :

*          The order of repulsions among various electron pairs is

            lone pair – lone pair – bond pair > bond pair – bond pair

*          Presence of lone pairs at the central atom causes distortion to the regular shapes and

            deviation in bond angles.

*          Triple bonds cause more repulsions than double bonds; double bonds cause more repulsions             than single bond.  But multiple bonds between two atoms count the same as single bond.

Q. Among the following molecule having lone pair – lone pair repulsion is