HRA vs Interest on home Loan

yes no doubt in that

No one can take exemption/deduction on HRA and interest on HL simultaneously. If he receives HRA ,when he is living in self occupaid house, is fully taxable and can not claim exemtion u/s 10(13A). But for first 6 months he can claim HRA exemtion.

yes u can

u can claim both the benefits simultaneously.

since location is different cities so can get the benifit of both