$S$ - Statement: The end product of starch digestion is galactose.
$R$ - Reason: Boron is a structural component of vitamins.

Match the following and choose the correct combination from the options given:

Column-$I$	Column-$II$
$(A)$ Ptyalin	$(1)$ Lipids
$(B)$ Pepsin	$(2)$ Starch
$(C)$ Steapsin	$(3)$ $DNA$
$(D)$ Nuclease	$(4)$ Proteins

Choose the correct answer among the following:
$(a)$ Gastric juice contains
$(i)$ pepsin,lipase and rennin
$(ii)$ trypsin,lipase and rennin
$(iii)$ trypsin,pepsin and lipase
$(iv)$ trypsin,pepsin and renin
$(b)$ Succus entericus is the name given to
$(i)$ a junction between ileum and large intestine
$(ii)$ intestinal juice
$(iii)$ swelling in the gut
$(iv)$ appendix

Mucus is secreted by:

Assertion: Lipases of bile help in the emulsification of fats.
Reason: Lipases can break large fat droplets into smaller ones.

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