I want to know the answer to the following question:
What organization is responsible for building and operating the Delhi Metro system?
All the background I'm provided with is that "The Delhi Metro, a mass rapid transit system built and operated by Delhi Metro Rail Corporation (DMRC), serves many parts of Delhi and the neighbouring cities Faridabad, Gurgaon, Noida and Ghaziabad.". Is that enough to answer the question?
Answer: yes