Serum differs from plasma due to absence of:
Answer: C) Fibrinogen. For Blood and their Component, once you lock onto the key mechanism or definition, Fibrinogen is the clear fit. If you restate the concept in your own words, cause and effect line up with Fibrinogen — that is the mechanism or reason the stem is pointing to. So Fibrinogen is the clean, accurate selection. If a similar stem appears later, start from the same core fact and you will land on the same kind of answer. In class notes, highlight this same phrase next to the related diagram so the wording and the picture reinforce each other. When you practise, cover the choices first, write Fibrinogen from memory, then reveal the letter — that habit builds real recall for Blood and their Component.
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.