I asked the question to make sure you weren't just guessing and had put the effort in to figure it out.
QUOTE]
Oh no, I'm not guessing. This is very important to me
However, this is the first exam in the Basics of the Basics. The book explained very shortly how the components work but nothing about circuits like this one. Since it's the Electronic's Basics, I'm pretty sure the answers, they are looking for, must be as simple as well. In addition, there is only one right answer.
Can you please explain to me, what is the diode on the right side is for?
Thanks