[" Which one of the following equations represents parametrically,parabolic profile? "],[[" (A) "x=3cos t;y=4sin t," (B) "x^(2)-2=-" cost ";y=4cos^(2)(t)/(2)],[" (C) "sqrt(x)=tan t;sqrt(y)=sec t," (D) "x=sqrt(1-sin t);y=sin(t)/(2)+cos(t)/(2)]]