Assertion $(A)$: Higher lattice enthalpy leads to greater stability of ionic compounds.
Reason $(R)$: Lattice enthalpy is a direct measure of the electrostatic forces of repulsion among the constituent ions in an ionic solid.
The correct answer is

• A
  Both $(A)$ and $(R)$ are correct and $(R)$ is the correct explanation of $(A)$
• B
  Both $(A)$ and $(R)$ are correct and $(R)$ is not the correct explanation of $(A)$
• C
  $(A)$ is correct,but $(R)$ is not correct
• D
  $(A)$ is not correct,but $(R)$ is correct