Task: Question Answering
Input (English): Question: John must arrange 3 different physics books and 4 different mathematics books on one shelf. If the first book on the leftmost side is a mathematics book and no physics book is next to another physics book. How many different arrangements exist?

 Option A: 6

 Option B: 9

 Option C: 36

 Option D: 120

 Option E: 144
Output (English): Option E