In which of the following activities are Indian Remote Sensing (IRS) satellites used?1.Assessment of crop productivity2.Locating groundwater resources3.Mineral exploration4.Telecommunications5.Traffic studiesSelect the correct answer using the code given below

1. A

   1, 2 and 3 only

   IRS satellites are Earth-observation craft used for crop assessment, groundwater prospecting and mineral exploration, among other resource applications. Telecommunications are the job of communication satellites (INSAT/GSAT class), and traffic studies as a dedicated IRS use are not in the same operational set. Hence 1, 2 and 3 only is the official key.

2. B

   4 and 5 only

   Telecommunications and traffic studies are not the defining IRS uses in this question; IRS is a remote-sensing series. This option is therefore wrong.

3. C

   1 and 2 only

   Crop and groundwater uses are real, but mineral exploration is also an IRS application, so 1 and 2 only is incomplete. This option is not the key.

4. D

   1, 2, 3, 4 and 5

   All five would include telecom and traffic as IRS roles. Those are not IRS mandates in the sense of the question. This option is not the key.

Summary. Official key is (a) 1, 2 and 3 only. Indian Remote Sensing satellites supply imagery for agriculture, water and minerals. Voice and data telecom ride communication satellites, not IRS. Traffic studies are not a listed IRS mission in this scheme. Statements 4 and 5 therefore drop out. Only the resource-mapping trio remains.