The first human drug made by using genetic engineering technique was

Which of the following complexes is not a chelate?

Which of the following ray diagrams shows physically possible refraction?

If the axes are rotated through an angle $45^{\circ}$ in the positive direction without changing the origin,then the coordinates of the point $(\sqrt{2}, 4)$ in the old system are

The maximum value of $\sin (\cos (\tan x))$ is

Let $a, b$ and $c$ be three positive real numbers such that the sum of any two of them is greater than the third. All the values of $\lambda$ such that the roots of the equation $x^2+2(a+b+c)x+3\lambda(ab+bc+ca)=0$ are real,are given by