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# Boltzmann curve is given below :

$(A)\; T_1 > T_2 > T_3 \\ (B)\; T_1 < T_2 < T_3 \\ (C) \; T_2 < T_1 < T_3 \\ (D)none\; of\; these$

Since velocity increases with temperature, Same fraction of molecules will have greater velocity at greater temperature.
=> $T_3 > T_2 > T_1$
Hence B is the correct answer.