Match the Colurnn I with Column ll.

	Column-I		Column-II
(A)	Kepler's first law	(p)	${\mathrm{T}}^2 \propto {\mathrm{a}}^3$
(B)	Kepler's second law	(q)	Inverse square law
(C)	Kepler's third law	r)	Orbit of planet is elliptical
(D)	Newton's law of gravitation	(s)	Law of conservation of angular momentum

According to Kepler's first law, all planets move in elliptical orbits with the sun situated at one of the foci.
A-r
Kepler's second law is a consequence of law of conservation of angular momentum.
B-s
According to Kepler's third law, the square of the time period of revolution of a planet is proportional to the cube of semi-major axis of the ellipse traced out by the planet.
              ${\mathrm{T}}^2 \propto {\mathrm{a}}^3$
C-p
According to Newton's law of gravitation, every particle mass  in the universe attracts every other particle mass with a force which is directty proportional to the product of their masses and inversely proportional to the square of the distance between them.
D-q