The correct answer is B. 2 to 5 per cent.
The no-load current drawn by a transformer is the current that flows through the transformer when there is no load on the secondary winding. This current is used to magnetize the core of the transformer and to power the losses in the transformer, such as the winding resistance and core losses.
The no-load current is typically a small percentage of the full-load current. The exact percentage will vary depending on the type of transformer, but it is typically in the range of 2 to 5 per cent.
Option A is incorrect because the no-load current is typically much higher than 0.2 to 0.5 per cent of the full-load current.
Option C is incorrect because the no-load current is typically much lower than 12 to 15 per cent of the full-load current.
Option D is incorrect because the no-load current is typically much lower than 20 to 30 per cent of the full-load current.