Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion (A):`BeCl_2`and `MgCl_2` produce characteristic flame
Reason (R) The excitation energy is high in `BeCl_2`, and `MgCl_2`
In the light of the above statements, choose the correct answer from the options given below:

Options

A. Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
B. (A) is false but (R) is true
C. Both (A) and (R) are true and (R) is the correct explanation of (A)
D. (A) is true but (R) is false