A

Sigma bonds ($$\sigma$$)-2, pi bonds ($$\pi$$)- 2, lone pairs of electrons (n)- 2

B

Sigma bonds ($$\sigma$$)-3, pi bonds ($$\pi$$)- 2, lone pairs of electrons (n)- 0

C

Sigma bonds ($$\sigma$$)-3, pi bonds ($$\pi$$)- 1, lone pairs of electrons (n)- 2

D

Sigma bonds ($$\sigma$$)-3, pi bonds ($$\pi$$)- 0, lone pairs of electrons (n)- 4