Detailed Answer
(a) To have an enforceable mortgage it must be in writing
and must include a description of the property and debt to be
incurred. Therefore, answer (a) is correct. Answer (b) is incorrect,
because although debt is usually evidenced by a promissory
note, this is not required to be. Answer (c) is incorrect because
the promise to pay is adequate consideration. Answer (d) is
incorrect because the amount of the debt and the interest rate are
not required to be stated in the mortgage.