A small block of mass 100 g is tied to a spring of spring constant $7.5\mathrm{~N~m}^{-1}$ and length 20 cm. The other end of spring is fixed at a particular point $A$. If the block moves in a circular path on a smooth horizontal surface with constant angular velocity $5\mathrm{~rad~s}^{-1}$ about point $A$, then tension in the spring is
(1) 0.75 N
(2) 0.25 N
(3) 0.50 N
(4) 1.5 N