Light causes reduction in neurotransmitter release due to:
Hyperpolarization (B) is the right choice. This sits at the heart of Sensory System Eye Physiology: the wording points straight to what is happening in the tissue or organ system. A useful study habit is to ask what the structure or process is for: cause and effect line up with Hyperpolarization — that is the mechanism or reason the stem is pointing to. That reasoning supports Hyperpolarization. One solid sentence about why this works is enough for recall — you do not need a long essay for every MCQ. When you practise, cover the choices first, write Hyperpolarization from memory, then reveal the letter — that habit builds real recall for Sensory System Eye Physiology.
Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.