My approach- Since a base is added the compound will release hydrogen ion.
My problem is from where will the ion be released?
Benzene ring containing bromine is more activated than the other benzene ring. So it should be difficult to extract hydrogen ion from it. But I am getting my answer right by doing so. Shouldn't hydrogen be removed from the other benzene ring?
Also how do we know how many hydrogen ions will release? Is it necessary that only one hydrogen ion is released?