Practice question

Pick B: Factor XII. Thinking about Blood and their Component in a practical way — what the structure does, or what the process achieves — leads you here. Clinically and academically, the same logic shows up again and again: Factor XII is the option that correctly names the structure, process, or principle asked for in Blood and their Component. Hence Factor XII is correct. Treat this as a building block for the rest of Blood and their Component; neighbouring topics often reuse the same principle. Keep a one-line summary card for this idea and revisit it before the paper; short, repeated review beats long cramming sessions.