Responsibility for free and fair elections in India lies with the Election Commission.

Explanation:
The Election Commission of India is an independent constitutional authority responsible for the superintendence, direction, and control of the entire process of conducting elections in the country. It was established in 1950 under Article 324 of the Indian Constitution.

Key Points:

1. Role of the Election Commission:
- The Election Commission ensures the conduct of free and fair elections in India by implementing various rules and regulations.
- It is responsible for the preparation, revision, and maintenance of the electoral rolls.
- The Commission oversees the delimitation of constituencies and the allocation of seats.
- It determines the schedule of elections and ensures the smooth conduct of polling.
- The Commission also enforces the Model Code of Conduct to guide political parties and candidates in their election campaigns.
- It has the power to cancel or countermand elections in case of irregularities or malpractices.
- The Commission also registers political parties and regulates their functioning.
- It monitors election expenses to ensure transparency and fairness.

2. Independent and autonomous:
- The Election Commission is independent of the executive and legislative branches of the government.
- It is a constitutional body and operates autonomously to maintain the integrity of the electoral process.
- The Chief Election Commissioner and the Election Commissioners are appointed by the President of India and enjoy security of tenure.

3. Ensuring transparency and fairness:
- The Election Commission takes various measures to ensure transparency and fairness during elections.
- It deploys election observers to monitor the conduct of elections and report any irregularities.
- The Commission also uses electronic voting machines (EVMs) to facilitate efficient and accurate voting.
- It conducts voter education programs to increase awareness and participation.

Conclusion:
The Election Commission of India plays a crucial role in upholding the democratic principles of free and fair elections. It operates independently and ensures transparency throughout the election process. By maintaining the integrity of the electoral system, the Commission strengthens democracy in India.

C) Election Commission as it the most important who conducts election and it has the to conduct free and fair election in a country.