Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R :

Assertion (A) : $\mathrm{BeCl}_{2}$ and $\mathrm{MgCl}_{2}$ produce characteristic flame

Reason (R) : The excitation energy is high in $\mathrm{BeCl}_{2}$ and $\mathrm{MgCl}_{2}$

In the light of the above statements, choose the correct answer from the options given below :

1. A $\mathrm{(A)}$ is true but $(\mathrm{R})$ is false
2. B Both (A) and $(\mathrm{R})$ are true and $(\mathrm{R})$ is the correct explanation of $(A)$
3. C (A) is false but (R) is true Correct answer
4. D Both (A) and (R) are true but (R) is NOT the correct explanation of (A)