Task: Question Answering
Input (English): Question: For a journey the cost of a child ticket is 1/3rd of the cost of an adult ticket. If the cost of the ticket for 4 adults and 5 children is Rs. 85, what is the cost of a child ticket?

 Option A: 3

 Option B: 4

 Option C: 5

 Option D: 6

 Option E: 7
Output (English): Option C