Task: Question Answering
Input (English): Question: A, B and C rent a pasture. A puts 10 oxen for 7 months, B puts 12 oxen for 5 months and C puts 15 oxen for 3 months for grazing. If the rent of the pasture is Rs. 280, how much must C pay as his share of rent?

 Option A: 45

 Option B: 50

 Option C: 55

 Option D: 65

 Option E: none
Output (English): Option E