Assertion: Addition of `Br_(2)` to `1`-butane gives two optical isomers.
Reason: The product contains one asymmetric carbon atoms.
A. Statement `I` is true, Statement `II` is true, Statement `II` is the correct explanation of Statement `I`.
B. Statement`I` is true, Statement`II` is true, Statement `II` is not the correct explanation of Statement `I`.
C. Statement `I` is true, Statement `II` is false.
D. Statement `I` is false, Statement `II` is true.