Which of the following linear combinations of atomic orbitals is incorrectly depicted?

Linear Combination Of Atomic Orbitals

If the z-axis if taken as the internuclear axis, then which of the following combinations of atomic orbitals is a nonbonding combination?

Which of the following combinations of atomic orbitals gives antibonding pi MO (assume z - axis as internuclear axis) ?

Conditions For Combinations Of Atomic Orbitals

Mention the conditions for combination of atomic orbitals.

What do you understand by linear combination of atomic orbitals?