Answer : 4. "New Delhi"
Explanation :

The Global Conclave on Plastic Recycling and Sustainability (GCPRS) kicked off at Bharat Mandapam, Pragati Maidan, New Delhi with the inauguration by Chief Guest Smt. Nivedita Shukla Verma. Prominent attendees included leaders from AIPMA and CPMA. Verma highlighted the need for collaborative efforts and government initiatives like the Plastic Waste Management Rules 2016. Smt. Mercy Apao emphasized on support to MSMEs. The conference aims to address plastic waste management, with India's industry estimated to reach $6.9 billion by 2033.