[" Q.4If tan "theta" and rec "theta" are the roots of the equation "ax^(2)+bx+c=0" ,then "],[[" (A) "a^(4)-b^(2)(-2ac+b^(2))," (B) "b^(4)=a^(2)(2ac+a^(2))],[" (C) "a^(2)-b^(4)=b^(2)(-4ac+b^(2))," (D) "b^(4)=a^(2)(4ac+a^(2))]]