Which $pH$ value is optimal for the action of enzymes on food in the stomach?

  • A
    $pH$ $3$ for protein digestion
  • B
    $pH$ $2$ for carbohydrate digestion
  • C
    $pH$ $7$ for converting proteins into peptones
  • D
    $pH$ $1.8$ to $2.0$ for converting proteins into peptones and proteoses

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