Deduction under section 24(b) query

Dear Experts,

Let us say there are couple named Mr. X and Mrs. X. For example, if Mr. X owns a house property registered in his name and the housing loan is also in the name of Mr. X, however the interest on housing loan is repayed by Mrs. X out of the earned by her.

Then who can claim deduction under section 24(b) on this payment i.e Mr. X or Mrs. X. ??

Thanks and Regards,

Dhrunil Bhatt