<prompt> Initiation of visual impulse is associated withCondensation of opsin with vitamin A aldehydePhotoisomerization and hydrolysis of visual purpleNADPNAD  <response>: Ans. b Photoisomerization and hydrolysis of visual purpleRef: Ganong, 25th edp. 179On exposure to light, there is conversion of 11 cis retinal to All trans retinal photoisomerization and hydrolysis of visual pigment 