Class 9 Biology MCQs (Grade 9) From Textbook

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Class 9 Biology MCQs – Certification Test 350

Vitamins MCQs (Question 350) – App & e-Book Download

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MCQ: 350

The substance whose deficiency makes it difficult to see things in dim light is

  1. opsin
  2. rhodopsin
  3. acetyl
  4. pepsin

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