Assertion $(A)$: Tertiary alcohols produce turbidity immediately with Lucas reagent.
Reason $(R)$: Lucas reagent is a $1:1$ mixture of conc. $HNO_3$ and anhydrous $ZnCl_2$.
The correct option among the following is:

• A
  $A$. $(A)$ is true,$(R)$ is true and $(R)$ is the correct explanation for $(A)$
• B
  $B$. $(A)$ is true,$(R)$ is true but $(R)$ is not the correct explanation for $(A)$
• C
  $C$. $(A)$ is true but $(R)$ is false
• D
  $D$. $(A)$ is false but $(R)$ is true