If the internuclear axis in the diatomic molecule `AB` is designated as the z-axis what are the varoius pairs of s,p or d atomic orbitals that can be combined to from (a) `pi_(x)` and (b) `pi_(y)` orbitals ? .

Explanation

(a) `(p_(x),p_(x)),(p_(x),d_(xz)),(d_(xz),d_(xz))`
(b) `(p_(y),p_(y)),(p_(y),d_(yz)),(d_(yz,d_(yz)))`
The figures below indicate the combination in xz-projection
.