According to Blondel’s theorem, if a network is supplied using ‘n’ conductor’s the total power is ________ of the reading of n wattmeter’s so arranged that a current coil of each wattmeter is in each line and the corresponding pressure coil is connected between that line and a common point

• A. Sum
• B. Product
• C. Sum of products of two wattmeter’s reading taken together
• D. Difference