Task: Question Answering
Input (English): Question: The total marks obtained by a student in Mathematics and Physics is 40 and his score in Chemistry is 20 marks more than that in Physics. Find the average marks scored in Mathamatics and Chemistry together.

 Option A: 40

 Option B: 30

 Option C: 25

 Option D: Data inadequate

 Option E: None of these.
Output (English): Option B