Housing Loan Interest

yes he can claim only that amount of deduction which he has paid
 

so if you pay whole you get full deduction or vice versa

But the next question is if the loan statement received from the bank says the the loan is in the name of both the parties.(Mr.A and Mrs.B in this case)

Then any problem will arise for Mr.A for claiming the entire amount of interest in his name

 Deduction of interest will be available to both Mr. A and his wife.