To control rupee weakening, - A: will help by reducing the Current account deficit. - B: will help by reducing the demand of dollars in loan-repayment. - C: will help by increasing the inflow of dollars and other currencies. - D: will backfire, because rupee currency supply will increase without corresponding increase in the supply of dollars and as a result: dollar will strengthen, Indian Rupee will weaken further. So D is the answer.
