Two coupled coils A and B are connected in series. The total inductances in series aiding and series opposing connections are LA and LB. The mutual inductance M is

• A. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/105-404-1.png">
• B. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/105-404-2.png">
• C. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/105-404-3.png">
• D. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/105-404-4.png">