Analogy type questions:
$(1)$ Dental formula of an adult human: $\frac{2123}{2123}$ :: Dental formula of a small child: ..............
$(2)$ Goblet cells: Secretion of mucus :: Oxyntic cells: ............

$A-$ About $30\%$ of starch is hydrolyzed by salivary amylase (optimum $pH\, 6.8$) in the buccal cavity.
$R-$ The saliva secreted into the oral cavity contains electrolytes $(Na^+, K^+, Cl^-, HCO_3^-)$ and enzymes,salivary amylase and lysozyme.

What would happen if our intestine harboured a microbial flora exactly similar to that found in the rumen of cattle?

Assertion : In the condition of obstructive jaundice,large amounts of unabsorbed fats are eliminated out of the body.
Reason : Entry of bile into the small intestine is prevented during obstructive jaundice.

Mucus is secreted by:

Correct the following statements by deleting one of the incorrect entries:
$(a)$ Goblet cells located in the intestinal mucosal epithelium secrete mucus/chymotrypsin.
$(b)$ Fats are broken down into di- and monoglycerides with the help of amylase/lipase.
$(c)$ Gastric glands of stomach mucosa have oxyntic cells/chief cells which secrete $HCl$.
$(d)$ Saliva contains enzymes that digest starch/protein.