In reverse blocking mode of a thyristor______?

A. Junction J2 is in reverse bias and J1, J3 is in forward bias.
B. Junction J3 is in forward bias and J1, J2 in reverse bias.
C. Junction J1, J3 is in reverse bias and J2 is in forward bias.
D. Junction J1 and J2 is in forward bias and J3 is in reverse bias.