If a chord, which is not a tangent of the parabola y2=16x has the equation 2x+y=p , and mid-point (h,k) , then which of the following is (are) possible value(s) of p,h and k ? [JEE Advanced 2017, 4M]
a. p=2,h=3,k=−4
b. p=−1,h=1,k=−3
c. p=−2,h=2,k=−4
d. p=5,h=4,k=−3