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\hline (a) & The point \( (8,8) \) is one extremity of focal chord of parabola \( y^{2}=8 x \). The length of this focal chord is & (p) & 1 \\
(b) & Ther equation \( \quad(26 x-1)^{2}+(26 y-3)^{2}=k \) \( (5 x-12 y+1)^{2} \) will represent a parabola if \( k \) is & (q) & \( 4 / 3 \) \\
(c) & The length of common chord of curves \( y^{2}=4(x+1) \) and \( 4 x^{2}+9 y^{2}=36 \) is & (r) & 4 \\
(d) & A focal chord of parabola \( y^{2}=4 a x \) is of length \( 4 a \). The angle subtended by it at the vertex of the parabola is \( \theta \) then \( |\tan \theta| \) is equal to & (s) & \( 25 / 2 \) \\
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\( \mathrm{D} \)
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