Select the correct answer. Which compounds are acting like Brønsted-Lowry acids in the following acid-base equilibrium?

HCO3− + H2O H2CO3 and OH−

A.
H2O and OH−

B.
HCO3− and OH−

C.
H2O and H2CO3

D.
HCO3− and H2CO3

B. a graduated substance

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts