Question

Question #a90b7

Answer 1

After looking at the possible choices, it looks like they ask only about Arrhenius or Brønsted acids.

For an Arrhenius or Brønsted acid, they release `H^+`.

Note - Arrhenius Acids release `H^+` only in an aquous solution.

However, there are Lewis acids which do not donate proton. They rather accept lone pair of electrons which explains their acidic nature.