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Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases1 Mark
MCQ
'Asthama' is due to:
  • A
    Infection of trachea
  • B
    Infection of lungs
  • C
    Bleeding into pleural cavity
  • D
    Spasm in bronchial muscles
✓

Answer

  1. Spasm in bronchial muscles

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