Which of the following statements is $NOT$ associated with enzymes?

Which of the following enzymes digests other enzymes?

What is the enzyme that catalyzes the removal of hydrogen from a substrate in a reaction called?

Which one of the following statements is incorrect?

Three of the following statements about enzymes are correct and one is wrong. Which one is wrong?

Given below are the statements regarding enzymes. Choose the correct statements.
$i$. All enzymes are proteinaceous.
$ii$. Enzyme becomes more active at the temperature of $60^{\circ}C$ to $70^{\circ}C$.
$iii$. Enzymes have one or two active sites where substrate binds with the enzyme.
$iv$. Any increase or decrease in specific $pH$,enzyme activity is always enhanced.
$v$. Enzymes remain active to catalyze again after completion of first reaction.