The correct option is Two hours.
Explanation
The local time of a place is determined by its longitudinal position. The Earth rotates 360° in approximately 24 hours, which means it covers 15° of longitude in one hour, or 1° in 4 minutes. The longitudinal extent of a country determines the time difference between its extreme east and west points.
Analysis of Time Difference:
- Longitudinal Extent: India extends from approximately 68°7' E in the west (Gujarat) to 97°25' E in the east (Arunachal Pradesh).
- Difference: The difference between these two longitudes is approximately 29° to 30°.
- Calculation:
- Since the Earth rotates 1° in 4 minutes:
- Time difference = 30° × 4 minutes = 120 minutes.
- 120 minutes = 2 hours.
- Consequently, the sun rises approximately two hours earlier in Arunachal Pradesh compared to Gujarat. To maintain uniformity, India follows a standard time based on the 82°30' E longitude (Standard Meridian of India).
Key Takeaway:
The longitudinal span of India is approximately 30°, resulting in a time lag of roughly two hours between the easternmost and westernmost points.