<prompt> Assertion: MTA is also used as base as it has insulating and anti-microbial characteristics; but primarily it is used as speciality material.Reason: Currently available MTA products have slow setting characteristics.Both Assertion and Reason are true and reason is an appropriate explanation to assertion.Both Assertion and Reason are true and reason is an inappropriate explanation to assertionBoth Assertion and Reason are falseAssertion is true but Reason is false  <response>: MTA is also used as a base because it is insulating, anti-microbial, and nonacidic. However, currently available products have slow setting characteristics. Thus, MTA is primarily a speciality material. 