Match the items given in column $I$ with those in column $II$ and choose the correct option.

Column $I$	Column $II$
$(a)$ Rennin	$(i)$ Vitamin $B_{12}$
$(b)$ Enterokinase	$(ii)$ Facilitated transport
$(c)$ Oxyntic cells	$(iii)$ Milk proteins
$(d)$ Fructose	$(iv)$ Trypsinogen

$A$ patient suffering from cholera is given a saline drip because:

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.

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.

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

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