A, B and C are partners in SBU Enterprises. Not having established yet their credit standing, the three partners requested D, a well-known businessman, to help them negotiate a loan from E, a money lender. With the consent of A, B and C, D represented himself as a partner of SBU Enterprises. Thereafter, E granted a loan of P150,000 to SBU Enterprises. What kind of a partner is D?*

a. Ostensible partner

b. Liquidating partner

c. Managing partner

d. Partner by estoppel