Ticket to Rameshwar by train is Rs. 1200 and ticket to Delhi is Rs. 900 from Mumbai. What is the ratio of cost to reach Delhi with respect to Rameshwar from Mumbai?

• A. ( frac{3}{4} )
• B. ( frac{3}{5} )
• C. ( frac{4}{3} )
• D. ( frac{5}{2} )