Much like humans, databases have relationships too.
If only S1 is closed, due to the diode across S3 is pointing to the right, the current cannot be flowing to the left.
So nothing will happen, the bulb is not on.
The correct answer is Choice B.
When you don’t want the top row to move as you are scrolling down the correct thing to do is freeze the column heading rows. This will keep the frozen row on the screen, while still scrolling through the rows below.
