Rhodopsin has a peak sensitivity to light of wavelength:
The photosensitive pigment in the rods is called rhodopsin (visual purple). Its opsin is called scotopsin. Rhodopsin has a peak sensitivity to light at a wavelength of 505 nm. Ref: Ganong's Review of Medical Physiology 23rd edition, Chapter 12.
100 nm
355 nm
505 nm
None of the above