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Body Fluids and Its Circulation question

2002 · Q8
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Body Fluids and Its Circulation question

2002 · Q8

NEETBiologyBody Fluids and Its CirculationMCQ+4 / −1
Impulse of heart beat originates from
  1. A
    SA node
  2. B
    AV node
  3. C
    vagus nerve
  4. D
    cardiac nerve
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