In the molecular orbital thoery

The following graph represents

A

$$\psi_{bonding} = \psi_{A} + \psi_{B}$$

B

$$\psi_{antibonding}=\psi_{A} - \psi_{B}$$

C

$$\psi_{A}$$ and $$\psi_{B}$$ for individual hydrogen atoms

D

Probability function for bonding orbitals