E9C02

What type of radiation pattern is created by two 1/4-wavelength vertical antennas spaced 1/4-wavelength apart and fed 90 degrees out of phase?

1. ACardioid
2. BA figure-eight end-fire along the axis of the array
3. CA figure-eight broadside to the axis of the array
4. DOmni-directional

Pick an answer to check it.