Question

Which of the following elements will have s and p orbitals
he
li
ca
o

Answer 1

Refer to number of electrons in the elements,
He, 2 electrons 1s2
Li, 3 electrons 1s2 2s1
Ca, 20 electrons 1s2 2s2 2p6 3s2 3p6 3d2
O, 8 electrons 1s2 2s2 2p4

Thus,
Ca and O has s and p orbital