Naming this organic compound What’s the name of the following compound?

$$\ce{CH3C(p-ClC6H4)2CH(Br)CH3}$$

My teacher said that she strongly thinks( with another teacher) that it should be 3-bromo-2,2-bis-(4-chlorophenyl)butane, though many other books and other students (similar to me) stated that it should be 2-bromo-3,3-bis-(4-chlorophenyl)butane.

She asked us try to find it out. Any organic chemistry experts out there?
I think your teacher is correct, numbering of carbons is done acording to the lowest locant rule.

The red numbering gives you : 2, 3, 3
The green numbering gives you : 2, 2, 3
We see that the first point of difference between the two numberings occurs at second number, so the green numbering is preferred.
Consequently, the correct name should be : 3-Bromo-2,2-bis(4-chlorophenyl)butane