Which of the following is/are the all-India services?
1. Indian Revenue Service
2. Indian Administrative Service (IAS)
3. Indian Police Service (IPS)
4. Indian Forest Service (IFS)
Select the correct answer by using the codes given below.
1
1, 2 and 3 only
2
2, 3 and 4 only
3
1 and 4 only
4
1, 2, 3 and 4
5
None of the above