Which Indian Metro has bagged ISO rating for energy efficient management, recently?

Delhi Metro
The Delhi Metro Rail Corporation (DMRC) has become the first ever Metro system in the country to be certified with the prestigious ISO 50001:2011 (EnMS) rating for efficient energy management. The ISO 50001: 2011 Energy Management System (EnMS) is a very recent ISO standard on energy management. It specifies requirements for establishing, implementing, maintaining and improving an energy management system, whose purpose is to enable an organisation to follow a systematic approach on achieving continual improvement of energy performance, including energy-efficiency, energy use and consumption. The Delhi Metro is now in the process of getting all the under-construction stations on Phase 3 to be certified as per ISO 50001:2011 standards.