Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the following is $\underline{\hspace{2cm}}$. A. $\mathrm{T_4 \gt T_3 \gt T_2 \gt T_1}$ 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. $${{{T_1}} \over {{v_1}}} = {{{T_2}} \over {{v_2}}} = {{{T_3}} \over {{v_3}}} e$$ constant E. The given spectrum could be explained using quantisation of energy.