O Level Biology MCQs (O Level) From Textbook

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O Level Biology MCQs – Certification Test 1231

Pollution: Sewage as Cause MCQ (Question 1231) – App & e-Book Download

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MCQ: 1231

Untreated sewage may cause

  1. outbreak of epidemic
  2. cholera outbreaks
  3. typhoid outbreaks
  4. all of above

Pollution: Sewage as Cause Textbook Tests – O Level Biology App & e-Book MCQ

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