The correct answer is option (a) (i), (ii), and (iii). Let's discuss each statement in detail to understand why they are true.

(i) Election Commission of India has enough powers to conduct free and fair elections in the country:
- The Election Commission of India (ECI) is an independent constitutional body responsible for conducting free and fair elections in the country.
- The ECI has been given extensive powers under the Constitution of India to ensure the conduct of fair elections. It has the power to supervise, control, and direct all stages of the electoral process.
- The ECI can issue guidelines, code of conduct, and instructions to political parties and candidates to ensure fair play during elections.
- It has the authority to cancel or countermand elections if malpractices or irregularities are detected.
- The ECI also has the power to disqualify candidates who violate election laws and take actions against political parties for any misconduct.

(ii) There is a high level of popular participation in the elections in our country:
- Elections in India witness a significant level of popular participation.
- The voter turnout in India has generally been high, with millions of eligible voters exercising their right to vote.
- The participation of citizens in the electoral process reflects the importance given to democratic values and the belief in the power of voting to bring about change.

(iii) It is very easy for the party in power to win an election:
- This statement is not true. Elections in India are generally competitive, and the party in power does not have an inherent advantage.
- The Election Commission ensures a level playing field for all political parties and candidates.
- The ECI enforces a code of conduct that prohibits the misuse of government machinery for electoral purposes.
- Political parties engage in vigorous campaigning, trying to win the support of voters through various means, such as rallies, public meetings, and social media campaigns.
- The outcome of elections depends on several factors, including the popularity of the party, the performance of the government, and the strategies adopted by political parties.

(iv) Many reforms are needed to make our elections completely free and fair:
- This statement is also true. While the Election Commission has made significant efforts to ensure free and fair elections, there is always room for improvement.
- Several electoral reforms have been suggested by experts, civil society organizations, and political parties to further strengthen the electoral process.
- Some of the areas that need reforms include campaign finance, criminalization of politics, electoral malpractices, and representation of marginalized sections of society.
- The ECI has been working towards implementing these reforms, but it requires the support and cooperation of all stakeholders to bring about comprehensive changes in the electoral system.

In conclusion, the correct answer is option (a) (i), (ii), and (iii). The Election Commission of India has enough powers to conduct free and fair elections, there is a high level of popular participation in elections, and winning an election is not easy for the party in power. However, there is a need for ongoing reforms to make elections completely free and fair.