A horizontal circular turn table has a boy standing at the edge at point A as shown in the figure. The turn table can rotate without fiction about a vertical axis passing through its centre O. It is set into motion with angular velocity $\omega$. Now the boy starts walking slowly with respect to the table along the diameter AB and after some time reaches B. During this time

Column I		Column II
A)	Moment of inertia of table + boy about a vertical axis through O	P)	Remains constant
B)	The angular velocity of the table.	Q)	First increases, then decreases
C)	The angular momentum of the (table + boy) system about O	R)	First decreases, then increases
D)	Kinetic energy of (table + boy) system	S)	Decreases continuously
		T)	Increases continuously