BEBRAS 2019 Grade 3-4 Round 2 Ext Question 11

Question 11

Beaver Bob, an amateur electrician, uses six switches to control six lamps. Each switch controls exactly one lamp, but the matching is unknown. Four observed configurations are shown below.

Question illustration

Which switches control the numbered lamps?

1-C, 2-F, 3-E, 4-A, 5-D, 6-B
1-C, 2-E, 3-D, 4-A, 5-F, 6-B
1-C, 2-F, 3-D, 4-E, 5-A, 6-B
1-C, 2-F, 3-B, 4-A, 5-D, 6-E