Match the items given in Column I with those in Column II and choose the correct option:

Column I

  • A. Rennin
  • B. Enterokinase
  • C. Oxyntic cells
  • D. Fructose

Column II

  • I. Vitamin $B_{12}$
  • II. Facilitated transport
  • III. Milk proteins
  • IV. Trypsinogen