Assertion : Nitriding is the process of heating steel in presence of `N_(2)` to form iron nitrides.
Reason : The surface of steel becomes hard after nitriding process.
A. Statement - 1 is true , Statement -2 is True , Statement -2 is a correct explanation for statement -2
B. Statement -1 : is true , Statement-2 is true , Statement -2 : Not a correct explanation for statement - 2
C. Statement-1 : is true , Statement -2 is false ,
D. Statement-1 : is false , statement-2 : is true
