" P " is an optically active compound with molecular formula C_6 H_12 O. When ' P ' is treated with 2, 4-dinitrophenylhydrazine, it gives a positive…

" P " is an optically active compound with molecular formula $\displaystyle \mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}$. When ' P ' is treated with $\displaystyle 2$, $\displaystyle 4$-dinitrophenylhydrazine, it gives a positive test. However, in presence of Tollens reagent, " P " gives a negative test. Predict the structure of " P ".