Select the incorrect pair.

• A
  Cellulose $=$ Polymer of $\beta-D$-Glucose
• B
  Sucrose $=$ $\beta-D$-Glucose and $\alpha-D$-Fructose
• C
  Lactose $=$ $\beta-D$-Galactose and $\beta-D$-Glucose
• D
  Starch $=$ Polymer of $\alpha-D$-Glucose