If is normal to , then ?
Explanation for the correct option:
Step : Find the value of and the slope .
Given : is normal to .
We know that, is the equation for the standard parabola and is the normal for the standard parabola
Comparing it with the standard parabola, we get
Now, from ,
We know that slope is given by
Differentiate with respect to ,
Step : Find the value of .
Put the value of and in the equation of normal ,
Since , thus the value of is .
Hence, Option is correct.