Which of the following radial probability curve is correct for a $3p$ -orbital? (Assume that all graphs have been plotted for the same parameters. In all these curves principal quantum number $<4$)

Number of radial node in $3p$ orbital  $=3-1-1=1$ is its radial probability curve will meet the  x- axis only at one point and this is the case in curve (A) and (C) is either for $3p$ or  $2s$ orbital. Also, as the shell number increases, the distance of maximum probability increases from the nucleus. Hence (C) is correct.