Which of the given statements is INCORRECT about glycogen?

Among the following, the energy of 2s orbital is lowest in :

A circle touching the x-axis at (3, 0) and making an intercept of length 8 on the y-axis passes through the point :

$$\mathop {\lim }\limits_{x \to 0} {{x + 2\sin x} \over {\sqrt {{x^2} + 2\sin x + 1} - \sqrt {{{\sin }^2}x - x + 1} }}$$ is :