Assertion :Metals and non-metals both can take part in the displacement reaction. Reason: Metals and non-metals both can displace less reactive metal/non-metal and forms product depending upon activity series.
Not only metals but also non-metals can take part in displacement reactions depending upon their order of reactivity. For example, chlorine can displace bromine from the non-metal salt solution like metal because it is more reactive than bromine. Hence, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.