DIRECTION: Read the following statements carefully and answer the questions accordingly. Assertion [A]: The Turks brought the technique of constructing the true arch on a massive scale. Reason [R]: The Turks introduced into India the technique of preparing lime-mortar.

• A.  Both A and R are true and R correctly explains A.
• B.  Both A and R are true but R does not explain A.
• C.  A is true but R is false.
• D.  A is false but R is true.