Which hormone tends to increase the blood glucose level in human?

Which of the following molecules is eliminated during peptide bond formation?

Vitamin-B$$_1$$ is

Assertion (A) An optically active amino acid can exist in three forms depending on the pH of the solution.

Reason (R) Amino acids contain both acidic and basic groups, they exist as Zwitter ion in aq. medium, anionic form in acidic medium and cationic form in basic medium.