which is a strong base?\no hcl\no naoh\no nh₃\no h₃co₃

Answer

Brief Explanations:

A strong base completely dissociates in water to release hydroxide ions ($OH^-$). HCl is a strong acid. $NH_3$ is a weak base. $H_3CO_3$ is an acid. NaOH is a strong base as it dissociates completely into $Na^+$ and $OH^-$ in water.

Answer:

B. NaOH