Discussion

Explanation:

The lift takes 1 minute to reach on 8th floor(where B gets down) and halts for 30 seconds there.
Now the lift takes 4 minutes to reach Groundd floor Where A bords the lift and halts for 30 seconds.
After that lift takes another 1 minute to reach the second floor.
So the total time taken by lift = 1 + 0.5 + 4 + 0.5 + 1 = 7 minutes
This means A will reach office by 9:15 and can leave office by 5:45.
Hence, option (d).

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