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Which of the following statements is/are correct with respect to Time Zone in India ? 1. There is one standard time for the whole country. 2. Andaman and Nicobar Islands and Lakshadweep Islands have different Time Zones. 3. Indian Standard Time (IST) is five and half hours behind GMT. Select the correct answer using the code given below :

Which of the following statements is/are correct with respect to Time Zone in India ? 1. There is one standard time for the whole country. 2. Andaman and Nicobar Islands and Lakshadweep Islands have different Time Zones. 3. Indian Standard Time (IST) is five and half hours behind GMT. Select the correct answer using the code given below : Correct Answer 1 only

The correct answer is 1 only.

Key Points

  • The Indian Standard Time (IST) :
    • The Indian Standard Time is calculated from 82°30’E meridian passing through Mirzapur.
    • It does not take into account daylight saving time along with other seasonal factors. India has only one-time zone.
    • Indian Standard Time is +5.30 Hours ahead of Greenwich Mean Time. Hence statement 3 is not correct.
    • Indian Standard Time (IST) is the time zone observed throughout India. Hence statement 1 is correct and Statement 2 is not correct.
    • Indian Standard Time is calculated on the basis of 82.5′ E longitude in the city of Mirzapur, Uttar Pradesh.
    • From the values of longitude, it is quite discernible that there is a variation of nearly 30 degrees, which causes a time difference of nearly two
      hours between the easternmost and the westernmost parts of our country. 
    • Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London, reckoned from midnight.
    • Daylight saving time is the practice of advancing clocks during warmer months.
    • Daylight Saving Time (DST) was used briefly during the China–India War of 1962 and the Indo-Pakistani Wars of 1965 and 1971.
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