The oxyntic or Parietal cells of the gastric mucosa secrete:
1. prorennin
2. pepsinogen
3. HCl and intrinsic factor
4. gastric lipase

Gastric juice of infants contains
1. Maltase, pepsinogen, rennin
2. Nuclease, pepsinogen, lipase
3. Pepsinogen, lipase, rennin
4. Amylase, rennin, pepsinogen

The proenzyme pepsinogen gets converted into the active enzyme pepsin on exposure to:
1. HCl
2. Enterokinase
3. Enterogastrone
4. Bile