Which one of the following statements relating to time is not correct ?

India's longitudinal extent spans approximately 30°, from 68°7' E in Gujarat to 97°25' E in Arunachal Pradesh [t2][t6]. This results in a local time difference of about two hours between the two states [c4][t9]. To maintain uniformity, India uses a single Indian Standard Time (IST) based on the 82°30' E meridian, which is 5 hours 30 minutes ahead of GMT [c1][c3]. The IST meridian is roughly the midpoint of India's longitudinal span. Consequently, Gujarat (westernmost) is about 14° west of the IST meridian, meaning it 'saves' or is about one hour behind its local solar time compared to IST. Conversely, Arunachal Pradesh (easternmost) is about 15° east of the IST meridian, meaning it 'loses' or is about one hour ahead of IST in local solar terms. Statement 3 is incorrect because Arunachal Pradesh loses approximately one hour, not two, relative to IST.

Sources

1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 18: Latitudes and Longitudes > Indian Standard Time > p. 245
2. [2] INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 1: India — Location > INDIA – LOCATION > p. 2
3. [3] CONTEMPORARY INDIA-I ,Geography, Class IX . NCERT(Revised ed 2025) > Chapter 1: India Size and Location > SIZE > p. 2
4. [4] https://www.britannica.com/science/Indian-time-zone