Yes, you can file RTI to Municipal Corporation of Delhi. The Municipal Corporation of Delhi (MCD) was a municipal corporation, an autonomous body that governed 8 of the 11 Districts of Delhi, in the state of Delhi, India. It was one of three municipalities in the National Capital Territory of Delhi, the others being New Delhi Municipal Council, and Delhi Cantonment Board. Municipal Corporation of Delhi was 'trifurcated', i.e. split into three smaller municipal corporations. The new North Delhi Municipal Corporation and South Delhi Municipal Corporation each contain 104 municipal wards, the smaller East Delhi Municipal Corporation contains 64 wards.
For further assistance and to have a better understanding on filing RTI, you may visit the below mentioned link:
https://onlinerti.com/how-to-file-rti-online-for-delhi