₹2,500, officials said on Monday.The initiative is part of an ongoing effort of Noida Authority with support from the Adani Group, which has provided it with 100 five-litre capacity oxygen cylinders, they said.The authority had recently started the facility for refilling oxygen in empty cylinders for patients in isolation centres through RWAs and Apartment Owners Associations (AOAs) amid a surge in demand for the life-sustaining gas in the region due to the pandemic.While the move brought relief to many people, trouble continued for several who found it difficult to arrange empty oxygen cylinders that were required to avail the facility.“Residents of sectors and villages in Noida who are under home isolation due to COVID-19 and have been.