Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the following is _______. A. $T_4>T_3>T_2>T_1$ 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. $\frac{T_1}{V_1}=\frac{T_2}{V_2}=\frac{T_3}{V_3} \neq$ constant E. The given spectrum could be explained using quantisation of energy.