how to remove duplicates if two rows and two columns are equal

Hi,

I want to check between column c and E if it has same values repeated more than once.

Same user has same ID twice remove one.

for Ex:

if
c2 has "Ram" and E2 has "sample001"

c5 has "Ram" and E5 has "Sample 001".

highlight the duplicate

Check this between columns c and E till the last row