P and Q are isomers of dicarboxylic... |JEE Advanced| Organic

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$\mathbf{P}$ and $\mathbf{Q}$ are isomers of dicarboxylic acid $\mathrm{C}_4 \mathrm{H}_4 \mathrm{O}_4$. Both decolorize $\mathrm{Br}_2 / \mathrm{H}_2 \mathrm{O}$. On heating, $\mathbf{P}$ forms the cyclic anhydride. Upon treatment with dilute alkaline $\mathrm{KMnO}_4, \mathbf{P}$ as well as $\mathbf{Q}$ could produce one or more than one from $\mathbf{S}, \mathbf{T}$ and $\mathbf{U}$.

Compounds formed form P and Q are, respectively

Select the correct option:

A

Optically active $\mathbf{S}$ and optically active pair ( $\mathbf{T}, \mathbf{U}$ )

B

Optically inactive $\mathbf{S}$ and optically inactive pair (T, U)

C

Optically active pair (T, U) and optically active S

D

Optically inactive pair (T, U) and optically inactive $\mathbf{S}$

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