INACTIVE compound must CONTAINS achiral carbon atom(s). Option [d] contains achiral carbon atom \[\underset{2-chloropropanol}{\mathop{C{{H}_{3}}-\underset{H}{\overset{CL}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-CHO}}\,\] \[\underset{2-\TEXT{chlorobutane}\,\,\,\,\,\text{(chiral)}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-\underset{H}{\mathop{\overset{Cl}{\mathop{\underset{|}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-C{{H}_{3}}}}\,\]\[\underset{2-\text{chloropentane}\,\,\text{(chiral)}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{H}{\mathop{\overset{Cl}{\mathop{\underset{|}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-C{{H}_{3}}}}\,\]\[\underset{2-\text{chloro}-2-\text{methylbutane}\,\,\,\text{(achira)}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-\underset{Cl}{\mathop{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-C{{H}_{3}}}}\,\]