Which of the following has/have asymmetric carbon atom?

Options

A. `H-undersetoverset(|)(H)oversetunderset(|)(Cl)(C ) - undersetoverset(|)(H)oversetunderset(|)(Br)(C )-H`
B. `H-undersetoverset(|)(H)oversetunderset(|)(H)(C )-undersetoverset(|)(H)oversetunderset(|)(Cl)C-Cl`
C. `H-undersetoverset(|)(H)oversetunderset(|)(H)(C ) - undersetoverset(|)(H)oversetunderset(|)(H)(C ) - H`
D. `H-undersetoverset(|)(Br)oversetunderset(|)(H)(C ) - undersetoverset(|)(OH)oversetunderset(|)(H)(C ) -CH_3`

Answer

D

Explanation

Carbon atom whose four valencies are satisfied by four different atoms or groups is called asymmetric carbon atom.
In (d) `BrH_2C - undersetoverset(|)(OH)oversetunderset(|)(H)(C ) - CH_3`
One asymmetric carbon atom is present .