According to Valence Bond Theory, the Triple Bond in Ethyne $\sigma$

According to valence bond theory, the triple bond in ethyne (acetylene, C₂H₂) consists of

A) three $\sigma$ bonds and no $\pi$ bonds.
B) two $\sigma$ bonds and one $\pi$ bond.
C) one $\sigma$ bond and two $\pi$ bonds.
D) no $\sigma$ bonds and three $\pi$ bonds.
E) none of the above.