The correct answer is option 4: 1, 2 and 3. This means that all three states, Assam, Gujarat, and Rajasthan, have crude oil or natural gas reserves.

To understand why option 4 is correct, let`s analyze each option:

Option 1 states that only Assam has crude oil or natural gas reserves. However, this is incorrect because Gujarat and Rajasthan also have such reserves.

Option 2 states that only Gujarat and Rajasthan have crude oil or natural gas reserves. This is also incorrect because Assam is known for its rich oil and gas reserves.

Option 3 states that only Assam and Rajasthan have crude oil or natural gas reserves. Once again, this is incorrect because Gujarat is another state that has significant reserves of crude oil and natural gas.

Finally, option 4 correctly states that all three states, Assam, Gujarat, and Rajasthan, have crude oil or natural gas reserves.

It is important to note that natural resource reserves can fluctuate over time due to extraction and geological factors. However, at the time of this question, all three states were known for their crude oil and natural gas reserves.