Question

Which bulbs would be on and or off if :

Bulb A was unscrewed
Bulb D was unscrewed
Bulb E was unscrewed

Answer 1

bulbs c and b would still be screwed in if they were in to begin with and bulbs A, D, and E. would be unscrewed

Answer 2

-- If Bulb-A is removed or burns out . . .
ON: B, D, E
OFF: A, C

-- If Bulb-D is removed or burns out . . .
ON: A, C, E
OFF: B, D

-- If Bulb-E is removed or burns out . . .
ON: none
OFF: all