- B4 and B1
- B3 and B2
- B2 and B3
- B1 and B3
Option 3 : B2 and B3
Five boxes: B1, B2, B3, B4 and B5.
Five colour: L1, L2, L3, L4 and L5.
1) Box B4 is placed in the top most rack.
2) Two boxes are placed between L2 coloured box and L5 coloured box.
Box | Colour (case - 1) | Colour (Case - 2) |
B4 | L2/L5 | |
L2/L5 | ||
L2/L5 | ||
L2/L5 |
3) L1 coloured box is placed immediate above L5 coloured box.
4) L5 coloured box is placed above L4 coloured box.
Box | Colour (case - 1) | Colour (Case - 2) |
B4 | L2 | L1 |
L5 | ||
L1 | L4 | |
L5 | ||
L4 | L2 |
5) Box B3 is coloured with L4.
6) Box B2 is coloured with L1.
So, case - 2 gets eliminated.
Box | Colour (case - 1) |
B4 | L2 |
B2 | L1 |
L5 | |
B3 | L4 |
3) Box B1 is not placed immediately above box B3.
Box | Colour (case - 1) |
B4 | L2 |
B1 | L3 |
B2 | L1 |
B5 | L5 |
B3 | L4 |
So, B2 and B3 boxes are placed immediately above and immediately below B5 box respectively.
Hence, option (2) is the correct answer.