Narysuj wzory półstrukturalne ALKINÓW 3-metylobut-1-yn 4-etyloheps-2-yn 4,4-dimetylopent-2-yn

A) _ C H _CH-CH-CH3 _ I CH3 b _ CH3-CH _CH-CH-CH2-CH2-CH3 _ I C2H5 CH3 C) _ I CH3-C _ C-C-CH3 _ I CH3