A solid cylinder of mass 2 kg and radius 4 cm rotating about its axis at the rate of 3 rpm. The torque required to stop after 2 revolutions is

(1) 2 × 10^{–6} N m

(2) 2 × 10^{–3} N m

(3) 12 × 10^{–4} N m

(4) 2 × 10^{6} N m

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