Consider the following statements related to the classification based upon the object of the survey :
1. Archaeological surveys for unearthing relics of antiquity.
2. Geological surveys for determining different strata in the Earth’s crust.
3. Mine surveys for exploring mineral wealth such as gold, coal, etc.
Which of the above statements are correct?
1
1 and 2 only
2
2 and 3 only
3
1 and 3 only
4
1, 2 and 3