20. In which of the following activities are Indian Remote Sensing (IRS) satellites used ?
1. Telecommunications
2. Traffic control
3. Mineral exploration
4. Locating ground water resources
5. Assessment of crop productivity
 

Select the correct answer from the code given below.

1. 1, 2 and 3 only

2. 4 and 5 only

3. 3, 4 and 5 only

4. 1, 2, 3, 4 and 5

Correct Answer :

3, 4 and 5 only