A : Mucus and bicarbonates are present in the lining of the mucosal epithelium.R : They play an important role in lubrication and protection of the mucosal epithelium of stomach.why isn't this the correct explanation?

A : Mucus and bicarbonates are present in the lining of the mucosal ep

1.	A : Mucus and bicarbonates are present in the lining of the mucosal epithelium.R : They play an important role in lubrication and protection of the mucosal epithelium of stomach.why isn't this the correct explanation?
Answer» A : Mucus and bicarbonates are present in the lining of the mucosal epithelium. R : They play an important role in lubrication and protection of the mucosal epithelium of stomach. why isn't this the correct explanation?