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1. মানবদেহের হৃদযন্ত্রের কোনটিকে Pace-maker বলে?

  • A. Atrio Ventricular node
  • B. Atrio Ventricular node
  • C. Atrio Ventricular node
  • D. Atrio Ventricular node

Answer: Option B

Explanation:

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