Took Personal Loan from my wife's bank account and transferred to my account to invest in stock

A user took a personal loan from their wife's bank account, transferred it to their own, and invested in the stock market. They are asking if the interest paid on this loan is tax-deductible, specifically if it can be added to the cost of acquisition for tax benefit purposes. The initial response suggests that interest payments to a spouse are generally not accepted by the Income Tax Department.