The area of $\Delta$le ABC in which $a=2,b=2.\angle C=60^{\large \circ}$ is

Question

$(a)\;4sq.unit\qquad(b)\;\large\frac{1}{2}$$sq.unit\qquad(c)\;\large\frac{\sqrt 3}{2}$$sq.unit\qquad(d)\;\sqrt 3sq.unit$