Hello there. I've been having a problem answering these questions about knives, and was wondering if anyone could help. I tried searching for hours, and nothing useful comes up.
1. Which is the most popular knife(among chef's) and why?
2. What are the 5 most common knives?
I was thinking of Chef's knife for the first one(because of the name

) but I need a confirmed answer.
Help is gladly appreciated

.