The correct decreasing order of energy, for the orbitals having, following set of quantum numbers:

(A) $\mathrm{n}=3,1=0, \mathrm{m}=0$

(B) $\mathrm{n}=4,\mathrm{l}=0, \mathrm{m}=0$

(C) $\mathrm{n}=3,\mathrm{l}=1, \mathrm{m}=0$

(D) $\mathrm{n}=3,1=2, \mathrm{m}=1$

Given below are the quantum numbers for $4$ electrons.

A. $\mathrm{n}=3,\mathrm{l}=2,{\mathrm{m}}_1=1,{\mathrm{m}}_{\mathrm{s}}=+\frac{1}{2}$

B. $\mathrm{n}=4,\mathrm{l}=1,{\mathrm{m}}_1=0,{\mathrm{m}}_{\mathrm{s}}=+\frac{1}{2}$

C. $\mathrm{n}=4,\mathrm{l}=2,{\mathrm{m}}_1=-2,{\mathrm{m}}_{\mathrm{s}}=-\frac{1}{2}$

D. $\mathrm{n}=3,\mathrm{l}=1,{\mathrm{m}}_1=-1,{\mathrm{m}}_{\mathrm{s}}=+\frac{1}{2}$

The correct order of increasing energy is

Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the following is _______.

A. T₄ > T₃ > T₂ > T₁
 B. The black body consists of particles performing simple harmonic motion.
 C. The peak of the spectrum shifts to shorter wavelength as temperature increases.
 D. $\frac{{\mathrm{T}}_1}{{\mathrm{\nu }}_1} = \frac{{\mathrm{T}}_2}{{\mathrm{\nu }}_2} = \frac{{\mathrm{T}}_3}{{\mathrm{\nu }}_3}$
 E. The given spectrum could be explained using quantisation of energy