In a three phase induction motor, the slip is generally:

Correct option is B

The value of slip in a 3 - phase induction motor generally ranges from 2% to 5%. The difference between the synchronous speed (Ns) of the stator field of an induction motor and the actual speed (Nr) of the rotor is called slip.

​$$\% \text{ Slip } (s) = \frac{N_s - N_r}{N_s} \times 100 \%$$​​