Introduction:
The cleanest city of India is Chandigarh. It is known for its well-planned infrastructure, cleanliness, and greenery. The city has consistently topped various cleanliness surveys conducted by the Indian government.

Reasons why Chandigarh is the cleanest city of India:

1. Well-planned infrastructure:
- Chandigarh was designed by renowned architect Le Corbusier and is known for its well-planned infrastructure.
- The city is divided into sectors, each with its own parks, markets, and residential areas.
- The planned layout ensures efficient waste management, proper drainage systems, and cleanliness.

2. Effective waste management:
- Chandigarh has a well-established waste management system in place.
- The city has a door-to-door waste collection system, ensuring that waste is collected from every household regularly.
- The collected waste is then transported to waste treatment plants for proper disposal, reducing the chances of pollution and maintaining cleanliness.

3. Strict enforcement of cleanliness rules:
- Chandigarh administration has implemented strict rules and regulations to promote cleanliness.
- Heavy fines are imposed on littering, spitting, and other activities that contribute to a dirty environment.
- This strict enforcement acts as a deterrent and encourages residents to maintain cleanliness.

4. Awareness and citizen participation:
- The residents of Chandigarh are highly aware of the importance of cleanliness and actively participate in maintaining a clean environment.
- Various campaigns and initiatives are organized by the administration to raise awareness and promote citizen participation in cleanliness drives.
- Regular cleanliness drives, tree plantation programs, and waste management workshops are conducted to engage the community.

5. Green city:
- Chandigarh is known for its abundant green spaces and parks.
- The city has a high percentage of tree cover, which helps in improving air quality and maintaining a clean environment.
- The presence of greenery also adds to the overall cleanliness and aesthetics of the city.

Conclusion:
Chandigarh stands out as the cleanest city of India due to its well-planned infrastructure, effective waste management system, strict enforcement of cleanliness rules, active citizen participation, and abundance of greenery. The city's commitment to cleanliness and sustainable practices sets an example for other cities to follow.

Chandigarh Correct answer is "A"