Answer:
Option A,C,D
Explanation:
Tangent to y^{2}=4x at (t^{2},2t) is

y(2t)=2(x+t^{2})
\Rightarrow yt=x+t^{2} ...........(i)
Equation of normal at P(t^{2},2t) is
y+tx=2t+t^{3}
since, normal at P passes through centre of circle S (2,8).
\therefore 8+2t=2t+t^{3}\Rightarrow t=2, i.e, P(4,4)
[Since, shortest distance between two curves lie along their common normal and the common normal will pass through the centre of circle ]
\therefore SP=\sqrt{(4-2)^{2}+(4-8)^{2}}=2\sqrt{5}
\therefore Option (a) is correct.
Also, SQ=2
\therefore PQ=SP-SQ=2\sqrt{5}-2
Thus, \frac{SQ}{QP}=\frac{1}{\sqrt{5}-1}=\frac{\sqrt{5}+1}{4}
\therefore Option (b) is incorrect.
Now, x- intercept of normal is
x=2+2^{2}=6
\therefore Option (c) is correct.
Slope of tangent= \frac{1}{t}=\frac{1}{2}
\therefore Option (d) is incorrect