Solution:

Assertion (A) is true. Gravitational field is a vector quantity, so fields from multiple masses can cancel out at certain points (e.g., between two equal masses). Gravitational potential, being a scalar sum of negative values \( V = \sum ( -\frac{Gm_i}{r_i}) \) for positive masses, can never be zero at a finite distance (only at infinity). Reason (R) is false. Gravitational field is a vector quantity, while gravitational potential is a scalar quantity. Thus, (A) is true but (R) is false.