Given below are two statements: one is labelled as Assertion \((A)\) and the other is labelled as Reason \((R).\) Assertion \((A) :\) Metallic character decreases and non-metallic character increases on moving from left to right in a period. Reason \((R)\) \(:\) It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period. In the light of the above statements, choose the most appropriate answer from the options given below :

1. A \((A)\) is false but \((R)\) is true.
2. B \((A)\) is true but \((R)\) is false
3. C Both \((A)\) and \((R)\) are correct and \((R)\) is the correct explanation of \((A)\)
4. D Both \((A)\) and \((R)\) are correct but \((R)\) is not the correct explanation of \((A)\)