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If the co-ordinates of two points A and B are $(\sqrt{7}, 0)$ and $(- \sqrt{7}, 0)$ respectively and P is any point on the conic $9 x^{2} + 16 y^{2} = 144$ then PA+PB is equal to

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Correct option is A

Equation of the given ellipse is x216+y29=1and foci will be 7,0,−7,0withe=74therefore, PA+PB=8

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If the co-ordinates of two points A and B are 7,0 and −7,0 respectively and P is any point on the conic 9x2+16y2=144 then PA+PB is equal to

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If the co-ordinates of two points A and B are $(\sqrt{7}, 0)$ and $(- \sqrt{7}, 0)$ respectively and P is any point on the conic $9 x^{2} + 16 y^{2} = 144$ then PA+PB is equal to