Question

Hemant CH3 and halogen which is given preference while both are attached to the phenyl group

Answer 1

If you have two groups on an alkane chain that both take prefixes, they are numbered in the way that gives the lowest possible number for both - with the constraint that one or the other end of the chain is carbon #1. 

Example: 5-bromo-1-phenylhexane, not 2-bromo-6-phenylhexane.

If you get the same numbers starting at either end of the chain, then the prefixes are numbered in alphabetical order.

Example: 2-bromo-5-phenylhexane, not 5-bromo-2-phenylhexane.

*This is only for alkanes.* If you have C-C multiple bonds, or suffix groups, they always take the lowest number possible and prefixes are numbered however they have to be.

(plz mark my answer as brainlist)