What is the formula for the resistance of running winding?

• A. resistance of running winding = 0.021 * no of turns in running winding * length of mean turns of running winding * area of running winding conductor
• B. resistance of running winding = 0.021 / no of turns in running winding * length of mean turns of running winding * area of running winding conductor
• C. resistance of running winding = 0.021 * no of turns in running winding / length of mean turns of running winding * area of running winding conductor
• D. resistance of running winding = 0.021 * no of turns in running winding * length of mean turns of running winding / area of running winding conductor