By which year has ISRO announced to land Mangalyaan 2 on Mars?

In which of the following cities was the first “International and 31st Annual Conference of Sahodaya School Complexes” organized by the Central Board of Secondary Education (CBSE)?

In which of the following countries the 30th United Nations Climate Change Conference (COP30) started?

In which state was the tri-service exercise named ‘Purvi Prachand Prahar’ conducted?

Which of the following has become the happiest city in Asia?