Which of the following isomerism is absent is alkynes?

Options

A. Chain isomerism
B. Position isomerism
C. Geometrical isomerism
D. Optical isomerism

Answer

C

Explanation

The sp hybrid of `-C-=C-` are linear ruling out cis-trans isomerism (or geometric isomerism) in which the substituents must be on different sides of the multiple bond.