Answer

A-(q,s) ;B-(q,r) ; C-(p) ; D-(s)

Explanation

A `to` (q,s) : if `x lt R rArr E =(rhox)/(3epsilon_0)`
if `x > R rArr E =(rhoR^3)/(3epsilon_0x^2)`
B `to` (q,r) , if r < R `rArr E =(rhor)/(2epsilon_0)`
if r > R `rArr E=(rhoR^2)/(2epsilon_0r)`
C `to` (p) : `E=sigma/(2epsilon_0)` Uniform electric field perpendicular to the surface.
D `to` (s) : For point charge electric field intensity is inversely proportional to the square of the distance for all points.
`E=Q/(4piepsilon_0r^2)`