<prompt> For color vision, which is true?Independent of wavelength of lightDepends on intensity discriminationInvolves opponent color cellsMinimum at fixation point  <response>: Ans. c Involves opponent color cellsRef: Ganong, 25th edp. 191Opponent process theory of color vision was proposed by HeringThis theory states that the three primary colors red, blue and green opposes one another so that the opponent color processing cell cant detect the presence of both colors at the same time 