Figure shows triangular lamina which can rotate about different axes moment of inertia is maximum, about the axis

Which one of the following statements is wrong for an isobaric process?

The energy of an electron in the excited hydrogen atom is $$-3.4 \mathrm{~eV}$$. Then according to Bohr's theory, the angular momentum of the electron in that excited state is ($$\mathrm{h}=$$ Plank's constant)

For a perfectly black body, coefficient of emission is