A passenger, on his transcontinental railway journey in Europe comes across the cities. What is the sequence in which he touches these cities in his east to west journey? 1. Belgrade2. Vienna3. Sophia4. Prague

• A. , 3, 4, 2
• B. , 2, 1, 3
• C. , 3, 4, 1
• D. , 1, 2, 4