Which of the following pairs of monosaccharides form sucrose?

  • A
    $\alpha - D - \text{glucopyranose and } \beta - D - \text{fructofuranose}$
  • B
    $\alpha - D - \text{galactopyranose and } \beta - D - \text{glucopyranose}$
  • C
    $\beta - D - \text{glucopyranose and } \alpha - D - \text{fructofuranose}$
  • D
    $\alpha - D - \text{glucopyranose and } \beta - D - \text{fructopyranose}$

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