Q. Which of the following come under Non-plan expenditure ?1. Subsidies      2. Interest payments  3. Defence expenditure 4. Maintenance expenditure for the infrastructure created in the previous plans .Chosse the correct answer using the codes given below: 

1. 1 and 2
2. 1 and 3
3. 2 and 4
4. 1,2,3 and 4