First iPhone with Siri

What was the first iPhone with Siri baked in? Was it the … A.) 1st-gen iPhone, B.) iPhone 3GS, C.) iPhone 4S or D.) iPhone 6?

 C.) iPhone 4S. Now, this is fascinating: Siri debuted as an iOS app in February 2010.

Tags: Apple iPhone, Apple Siri, apps, iOS, Now