In the below figure, the load is highly inductive. The firing angle is a for each of the thyristors. The periods of conduction of Th1 and Th2 respectively are

• A. 0 to π and π to 2π
• B. α to π and π + a to 2π
• C. α to π + α and π + π to 2π + α
• D. α to π - α and π + α to 2π - α