In a 3 phase VSI out of eight valid states, the number of valid states that produce zero ac line voltages is/are_________?

In a 3 phase VSI out of eight valid states, the number of valid states

1.	In a 3 phase VSI out of eight valid states, the number of valid states that produce zero ac line voltages is/are_________?
A.	One
B.	two
C.	Three
D.	Four
Answer» C. Three