Indian Standard Time is determined taking the meridian of longitude 82.5° East as the standard meridian that passes close to ___________.

Correct option is A

The correct answer is (a) Allahabad.
· Indian Standard Time (IST) is determined based on the 82.5° East meridian, which passes near Allahabad (now known as Prayagraj), Uttar Pradesh. This meridian serves as the standard time reference for the entire country.
· The 82.5° E longitude lies roughly halfway across India and was chosen as the standard meridian to avoid confusion with local times and to provide a uniform time zone across the country.
· This meridian is about 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT+5:30), which is the time offset for Indian Standard Time.
Information Booster:
· Indian Standard Time (IST): The time observed throughout India and Sri Lanka, based on the 82.5° E longitude.
· Meridian of 82.5° E: Chosen because it runs roughly through the middle of India, providing an ideal time zone for the entire country.
· Allahabad (Prayagraj): The city closest to the 82.5° E longitude, making it the reference point for IST.
· Time Zones: Used to maintain a uniform standard time in countries with wide geographical areas.
· GMT +5:30: The time offset from the prime meridian (Greenwich Mean Time) used for IST.