या दिवशी मुंबईकरांसाठी वर्सोवा ते घाटकोपर मार्गासाठी मुंबई मेट्रो चालू झाली.

The correct answer is Option B (8 June 2014).

Key Points:
• Mumbai Metro Line 1 Launch:
• Mumbai Metro Line 1 (Versova–Andheri–Ghatkopar corridor) was officially inaugurated on Sunday, 8 June 2014, by the then Chief Minister of Maharashtra, Prithviraj Chavan.
• Key facts about the project:
• It covers an 11.40 km elevated route connecting the western and eastern suburbs of Mumbai.
• It includes 12 stations, reducing travel time between Versova and Ghatkopar from 90 minutes by road to approximately 21 minutes.
• The project was developed under a Public-Private Partnership (PPP) model by Mumbai Metro One Pvt Ltd (MMOPL), a joint venture between Reliance Infrastructure, MMRDA, and Veolia Transport.
• Key Takeaway: Mumbai Metro Line 1 (Versova to Ghatkopar) began commercial operations on 8 June 2014.