JEE Math Practice Question
For an integer $n \geq 2$, if the arithmetic mean of all coefficients in the binomial expansion of $(x+y)^{2 n-3}$ is 16 , then the distance of the point $\mathrm{P}\left(2 n-1, n^2-4 n\right)$ from the line $x+y=8$ is
- A.$\sqrt{2}$
- B.$2 \sqrt{2}$
- C.$5 \sqrt{2}$
- D.$3 \sqrt{2}$
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