Who can tell me which is the best Antivirus right now?

I had a heating argument with my client today about which is the leading antivirus today? She insisted that Kaspersky is the best Antivirus out there right now coz its selling which is a good point that’s why i gave her what she wants.. But was she correct?.. cus frankly i got other products at top of my lists besides Kasper based on my little observation on various issues