Question:

Which of the following is an example of a complete protein source?

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Combining different plant proteins (e.g., rice and beans) can provide all essential amino acids in a vegetarian diet.
  • Rice
  • Lentils
  • Eggs
  • Wheat
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The Correct Option is C

Approach Solution - 1


Complete proteins contain all nine essential amino acids required by the human body. Animal-based foods like eggs, meat, and dairy are complete protein sources. Plant-based foods like rice, lentils, and wheat are incomplete proteins, lacking one or more essential amino acids.
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Approach Solution -2

Definition Match: 'Complete protein' has one exact definition — contains ALL nine essential amino acids — check each option against it.

Eggs contain all nine essential amino acids in the right proportions, making them a classic complete (animal-based) protein source.

Rice, lentils, and wheat are all PLANT-based proteins that each lack at least one essential amino acid, making them incomplete proteins on their own.
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