| Like other body cells, the epithelial cells lining the stomach are protein in nature. Yet the epithelial lining is not digested by the powerful proteolytic enzyme secreted by the stomach because |
| (a)Both mucus and bacteria give protection against autodigestion |
| (b)A rich microflora of bacteria makes the enzyme totally inactive for autodigestion |
| (c)The excess acidity of gastric juice destroys this enzyme |
(d)The mucus secreted by mucus protects against autodigestion  |
