Answer:
D) two unhybridized p orbitals
Step-by-step explanation:
In covalent bond, to form a bond, each of the two participating atoms would put down an unpaired electron to be used in forming a shared pair of electrons between them.
There are two types of covalent bonds:
A sigma bond
![\sigma](https://img.qammunity.org/2021/formulas/mathematics/high-school/a9vhoz94zj78zkyosheqzpla4kkjdmop92.png)
A pi bond
![\pi](https://img.qammunity.org/2021/formulas/mathematics/high-school/2j2worn9ytoxzzhoj9a714ilg18jf2lvx4.png)
A sigma bond is formed when a hybrid orbital (sp,sp² and sp³) overlaps with another hybrid orbital or with s- or p- orbital.
A pi bond is formed when a p-orbital overlaps with another parallel p-orbital laterally. This implies that ,a π bond could be formed from the overlap of two unhybridized p orbitals.