The correct option is D Election Commission of India
The Election Commission of India is an autonomous Constitutional body that regulates the elections in India. Not only it supervises and controls the election process but also other matters related to elections such as hearing grievances related to election members, providing model code of conduct, allotting symbols to the political parties and giving recognition to the political parties on the national and regional basis provided that they fulfill the essential criteria laid down by the Election Commission in this regard.