Arrange the words given below in a meaningful sentence: 1. Key 2. Door 3. Lock 4. Room 5. Switch on

1, 2, 3, 4, 5

1, 3, 2, 4, 5

4, 2, 1, 5, 3

5, 1, 2, 4, 3

The meaningful sentence is "Key, Lock, Door, Room, Switch on".

It means you use a key to lock the door of a room, then switch on the light.