C) 2,2-dimethyl-3-heptyne
how to draw

First you draw a straight chain containing 7 carbon atoms
Then you add a triple bond next to the third carbon atom because it’s alkyne
You will add 1 CH3 above the second carbon atom and one below so it will be 2,2-dimethyl
So it will be :
CH3
|
CH3-C _CH2-CH2-CH2-CH2-CH3
| =
CH3

What’s the question

Do not include the unexpected results