📊 Biology
Q. Roughage, a necessary constituent of diet, consists largely of indigestible
  • (A) carbohydrates such as cellulose and lignin
  • (B) carbohydrates (cellulose and lignin) and unsaturated fatty acids
  • (C) carbohydrates (cellulose and lignin) and semi-cooked meat
  • (D) all of the above
✅ Correct Answer: (A) carbohydrates such as cellulose and lignin

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