Which of the following compounds does not exhibit mutarotation?

If the difference between the roots of the equations $x^2 + ax + b = 0$ and $x^2 + bx + a = 0$ is the same and $a \neq b$,then:

Identify the basic amino acid from the following.

Ground tissue includes

For an electron with $n = 3$,there is only one radial node. The orbital angular momentum of the electron will be

The transition from the state $n = 4$ to $n = 3$ in a hydrogen-like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition: