Concept: This question tests awareness of current affairs, specifically the launch of India’s first electric double-decker bus in Mumbai.Explanation:India's first electric double-decker bus was launched in Mumbai as part of modernising public transport.The official launch was done by the Union Minister of Road Transport and Highways, Nitin Gadkari.Among the given options, Nitin Gadkari is the correct personality associated with this event.Answer: B. Nitin Gadkari