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Multiple Choice Question

Which biological indicator is officially prescribed for validating Moist Heat Sterilization (Autoclaving) at 121°C?

  • A
    Bacillus pumilus
  • B
    Bacillus subtilis
  • C
    Geobacillus stearothermophilus
  • D
    Clostridium sporogenes
Explanation:
Geobacillus stearothermophilus (spores) is the official biological indicator for steam autoclaving. Bacillus subtilis is used for dry heat and ethylene oxide, while Bacillus pumilus is used for radiation sterilization.
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This question belongs to the set "RRB Pharmacist (Entry Grade) CBT Mock Test 1". Click below to read detailed notes and attempt the full quiz.

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