1. First Indian Military Heritage festival was inaugurated in October 2023 in Pune
2. First Green Hydrogen Fuel Cell Bus was flagged off in India in Bangalore
3. South Africa chaired the 15th BRICS Summit held in 2023
4. Viksit Bharat Sankalp Yatra was flagged off in 2023 from Jharkhand
How many of the above statements is/are correct?