Chapter 18, Problem 3RA

Which of these statements about gastric secretion of HCI is false ?

$\begin{array}{l}\text{a}\text{. HCI is secreted by parietal cells}\text{.}\hfill \\ \text{b}\text{. HCI hydrolyzes peptide bonds}\text{.}\hfill \\ \text{c}\text{. HCI is needed for the conversion of pepsinogen to pepsin}\text{.}\hfill \\ \text{d}\text{. HCI is needed for maximum activity of pepsin}\text{.}\hfill \end{array}$