If normal at P(2, {(3√3)/2}) meets the major axis of the ellipse x²/16+y²/9=1 at Q and S,S′ are foci of given ellipse along positive and negative directions of axes, then the ratio SQ:S′Q is a. (7–√8)/(7+√8) b. (8−√7)/(8+√7) c. (7+√8)/(7–√8) d. (8+√7)/(8–√7)