Column I		Column II
A)	Linear  momentum  of system  is conserved throughout  in $x-\text{direction}$	P)	Uniform circular motion on horizontal plane
B)	Potential  energy of system is conserved throughout	q)	Particle projected with initial velocity and undergoing circular motion in vertical plane
C)	Mechanical energy of system	r)	Two bodies moving  in circular path $\left({\text{m}}_{\text{1}}{\text{\&m}}_{\text{2}}\right)$ under their mutual attraction force
D)	Kinetic energy of system  is conserved throughout	s)	System: ${\text{m}}_{\text{1}}{\text{\&m}}_{\text{2}}$ and spring Block $m_1$ collides with spring fixed to ${\text{m}}_{\text{2}}$ and compressing it Surfaces are frictionless.
		t)	M moving on frictionless wedge and M which is kept on frictionless surface.