By which of the following names is the S - A node of mammalian heart known as?

Options :
  1. Autoregulator
  2. Pacemaker
  3. Time controller
  4. Beat regulator
Answer and Explanation :-

Answer: Option 2

Explanation:

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Now you people have names. That's because you don't know who you are. We know who we are, so we don't need names.
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