Solved UPSC CDS/OTA Question
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Q · Circulatory SystemMedium · 45s
The SA node is known as:
TopicCirculatory System
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
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The SA node (sinoatrial node) initiates the heartbeat and sets the pace.
Final Answer: Option A — Pacemaker of the heart