The correct sequence of the mentioned coal mines of India from east to west is: 3. Raniganj, 1. Bokaro, 4. Bishrampur, 2. Adilabad.
- Raniganj is located in West Bengal, which is towards the eastern part of India.
- Bokaro is located in Jharkhand, which is slightly west of Raniganj.
- Bishrampur is located in Chhattisgarh, which is further west of Bokaro.
- Adilabad is located in Telangana, which is the westernmost of the mentioned coal mines.
Therefore, the correct sequence is 3-1-4-2, as provided in option 2.
Please note that the provided answer is correct.