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

Choose the correct sentences.
$(1)$ Electrolytes like $Na^+, K^+, Cl^-, HCO_3^-$ are present in saliva.
$(2)$ Starch is converted into maltose by the help of salivary amylase at $pH \, 6.8$.
$(3)$ The intrinsic factor of the stomach is essential for the absorption of vitamin $B_{12}$.
$(4)$ Di- and monoglycerides are broken down into fatty acids and glycerol by lipases.

Which of the following statements is incorrect?

Which of the following statements is incorrect regarding the human digestive system?

Which of the following will release more energy on oxidation? Arrange them in ascending order.
$(a)$ $1 \; g$ of fat
$(b)$ $1 \; g$ of protein
$(c)$ $1 \; g$ of glucose
$(d)$ $0.5 \; g$ of protein $+ 0.5 \; g$ of glucose

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