<prompt> Best way to prevent hypotension during spinal anaesthesiaPreloading with crystalloidsPreloading with crystalloidsMephentermineTrendelenburg position  <response>: Best method to prevent hypotension is to preload the patient with crystalloids or colloids. B, C, D are used as a pa of treatment not preventive measures. Prophylactic fluid preloading before spinal anesthesia has been a routine procedure to prevent maternal hypotension during cesarean delivery. Unlike colloid, timing of infusion of crystalloid may be impoant because of its sho stay in intravascular space Ref Robbins 9e pg 765 