Draw the structures of the following compounds:
4-Nitro-1-pentyne

Which of the following represents the correct IUPAC name for the compounds concerned:
(a) 2, 2-Dimethylpentane or 2- Dimethyl-pentane.
(b) 2, 3-Dimethylpentane or 3, 4-Dimethyl-pentane.
(c) 2, 4, 7-Trimethyloctane or 2,5,7-Trimethyl- octane.
(d) 2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane.
(e) But -3- yn-l-ol or But-4-ol-l-yne. 

Give both the IUPAC and common names and find the number of primary, secondary and tertiary carbon atoms in