$P$ is the extremity of the latus rectum of the ellipse $3x^{2} + 4y^{2} = 48$ in the first quadrant. The eccentric angle of $P$ is

  • A
    $\frac{\pi}{8}$
  • B
    $\frac{3\pi}{4}$
  • C
    $\frac{\pi}{3}$
  • D
    $\frac{2\pi}{3}$

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Assertion $(A)$: The length of the latus rectum of an ellipse is $4$. The focus and its corresponding directrix are respectively $(1, -2)$ and $3x + 4y - 15 = 0$. Then its eccentricity is $\frac{1}{2}$.
Reason $(R)$: The length of the perpendicular drawn from the focus of an ellipse to its corresponding directrix is $\frac{a(1 - e^2)}{e}$.
Which one of the following is correct?

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