AP EAMCET Engineering 22 Sep 2020 Shift 1 Paper

Carbonyl group has more priority than double bond and bromine, so numbering should be start from carbonyl side.
Br

7

C

H2‌

6

C

H2‌

5

C

H=

4

C

H‌

3

C

H2‌

2

C

O‌

1

C

H3
Thus, the correct IUPAC name of the given compound is 7-bromohept-4-en-2-one.