In piperidine "N" atom has hybridization:

1. sp

2. $s{p}^2$

3. $s{p}^3$

4. $ds{p}^2$

The number of (i) sp² hybridized carbon atoms and (ii) $\mathrm{\pi }$ bonds are present in the following compound are:

1. 7, 5

2. 8, 6

3. 7, 6

4. 8, 5

In a regular octahedral molecule, MX₆, the number of X–M–X bonds at 180º is: