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

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

On which of the following days is the International Day of Light celebrated every year?

In which of the following cities has the India Meteorological Department launched India’s first AI enabled block level monsoon forecasting system? 

Who among the following has been appointed as the Chairperson of CBFC (Central Board of Film Certification)?