In the study of chlorination of propane, four product (A,B & C,D) of the formula `C_(3)H_(6)Cl_(2)` were isolated. Each was further chlorinated to provide trichloro products `(C_(3)H_(5)Cl_(3))`. It was found that A provide one trichloro product, B gave two and C&D each gave three. It is found that D is optically active.
Q. Correct formula of the compound D is
A. `CH_(3)C Cl_(2)CH_(3)`
B. `CLCH_(2)CH_(2)CH_(2)Cl`
C. `CH_(3)CH_(2)CHCl_(2)`
D. `ClCH_(2)CHClCH_(3)`