Primary site of carbohydrate digestion and absorption is:
Small intestine (C) is the right choice. This sits at the heart of Digestive System: 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: Small intestine is the option that correctly names the structure, process, or principle asked for in Digestive System. That reasoning supports Small intestine. 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 Small intestine from memory, then reveal the letter — that habit builds real recall for Digestive System.
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.