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Railways PYQCBT 1 2016

RRB NTPC · Question 34

There are over ______ capillaries in our lungs. A. 100 million B. 200 million C. 400 million D. 300 million

  1. B

  2. D

  3. A

  4. C

Show answer & explanation

Answer: (B) D

Explanation

The lungs contain several hundred million capillaries wrapped around the alveoli; the official key gives over 300 million.