An 4-pole 50 Hz induction motor with rotor resistance of 0.2 Ω produces a maximum torque of 10 N-m at 1200 rpm. At maximum torque, what will be rotor reactance and the difference between synchronous and asynchronous speeds (slip) respectively?

• A. 2 Ω and 0.1 p u
• B. 1 Ω and 0.1 p u
• C. 2 Ω and 0.2 p u
• D. 1 Ω and 0.2 p u