The correct answer to the question is [tex]T^2\ \alpha\ d^3[/tex].
EXPLANATION:
As per Kepler's third law on planetary motion, the square of time period of rotation of a planet around sun is directly proportional to the cube of semi major axis.This law is also called as harmonic law.
Let us consider a planet which is revolving around sun in an elliptical orbit.
Let R is the semi major axis of this elliptical orbit and T is the time period rotation of the planet around the sun.
As per Kepler's law, time period and semi major axis are related as -
[tex]T^2\ \alpha\ R^3[/tex]
