$A$: Gastric emptying is slowest after a fat-laden meal containing a large number of triglycerides.
$R$: Fatty acids in chyme stimulate the release of both $CCK$ and $GIP$,which slow stomach emptying.

Go through the following statements regarding the physiology of digestion and identify whether they are true or false. Choose an appropriate option from the codes given below:
$I.$ Largest variety of hydrolases are present in omnivores,while the herbivores generally lack digestive enzymes.
$II.$ Digestive enzymes are of four types,namely,amylase,proteinases,lipases,and nucleases.
$III.$ Proteinases are also known as proteases,which are released in the active form because the proteins,either cellular or extracellular,are all hydrolysed by them in the absence of food.
$IV.$ Hydrolases and cholecystokinin are secreted by the exocrine part of the pancreas.

Study the following diagram showing $(P-S)$ labelling and choose the correct option that shows two correct matches.

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.

The enzyme that is not present in succus entericus is

Vitamin $A$ is synthesized from carotene in the ...... .