Stains of rust on clothes can
be removed by :
1). Oxalic acid
2). Petrol
3). Alcohol
4). $H_{2}O_{2}$
2. P : Q = 2 : 3, Q : R = 2 : 1, P : R = ?
6. All are advantages of project strategy except:
7. Which of the following is the first step in the scientific method of problem -solving ?
8. Diagnosis of the gaps in the learning of students should be followed by___
9. Externality theory is the basic theory of the following branch of Economics: