Which of the following countries has developed the Yildirimhan missile, which has been in the news?

At which of the following locations has India’s first hydrogen bus service been launched?

In which of the following countries has IIT Madras launched its first international center to promote deep-tech startups?

In which of the following countries was the first international conference on moving away from fossil fuels held? 

In which of the following cities was India’s first International Ophthalmology Research Conference held?