This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
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. 
Select and explain. 
A. Both Assertion and Reason are true and reason is an appropriate explanation to assertion., B. Both Assertion and Reason are true and reason is an inappropriate explanation to assertion, C. Both Assertion and Reason are false, D. Assertion is true but Reason is false
A: Both Assertion and Reason are true and reason is an appropriate explanation to assertion.
Answer: A: Both Assertion and Reason are true and reason is an appropriate explanation to assertion. 
Explanation: 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.