$X$ is a statement and $Y$ is the reason. Give your opinion of the following: $X -$ Absorption takes place only in the small intestine. $Y -$ Stomach secretes Trypsinogen.

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

Go through the following statements regarding starch digestion. Separate true and false statements and select the correct option accordingly.
$I.$ Digestion of starch starts from the mouth.
$II.$ Around $30 \%$ of the starch is digested in the stomach.
$III.$ Digestion of food requires the action of pancreatic juices.
$IV.$ Digestion of food is completed in the longest part of the alimentary canal.

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

Select the incorrect option regarding the digestion and absorption of substances in different parts of the digestive system.

Some animals eat their feces to digest the cellulose contents again; such animals are known as: