Python (pandas) : Remove duplicates row based on multiple columns But need to add the other columns of the duplicate entries

Question

I have a dataframe which contains duplicates values according to two columns (A and B):

A B C
1 2 1
1 2 4
2 7 1
3 4 2
3 4 8

I want to remove the duplicates by keeping the columns A and B and C should be the sum of the duplicate entries

A B C
1 2 5
2 7 1
3 4 10

I cannot figure out how to implement this in my code!! Please help