The correct option is C Vienna
According to Mercers 20th annual Quality of Living survey 2018, Vienna has topped the ranking among 231 cities for the 9th consecutive year. It is followed by Switzerlands Zurich, while New Zealands Auckland and Germanys Munich tied for third place. In the 2018 survey, Hyderabad and Pune have been jointly ranked at 142, making the best Indian cities to live in. They were closely followed by Bengaluru (149), Chennai (151), Mumbai, (154), Kolkata (160), with New Delhi (162) taking the last spot as it continues to battle rising traffic congestion and air pollution. The quality of living survey is conducted to help governments and major companies place employees on international assignments. The survey also identifies those cities with the highest personal safety ranking based upon internal stability, crime, effectiveness of law enforcement and relationships with other countries.