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Given that, $\text{P: Q : R : S} = 5:2:4:3$

Let,

- $\text{P} = 5k$
- $\text{Q} = 2k$
- $\text{R} = 4k$
- $\text{S} = 3k$

Now, $\text{R} = \text{S} + 1000$

$\Rightarrow 4k = 3k + 1000$

$\Rightarrow {\color{Blue}{\boxed{k = 1000}}}$

$\therefore$ The share of $\text{Q} = 2k = 2(1000) = \text{₹}\;2000.$

$\textbf{Short Method:}\; \text{P: Q : R : S} = 5:2:\underbrace{4:3}_{1}$

Now,

- $1 \longrightarrow \text{₹}\;1000$
- $2 \longrightarrow \text{₹}\;2000$

Correct Answer $:\text{D}$