Although the human population of India is increasing at a rapid rate, the bird population is declining rapidly because :

1. There has been extraordinary increase in the number of predators.

2. Organic pesticides and organic fertilizers are being used on a large scale.

3. There has been a large scale reduction in the habitat of birds.

4. Insecticides, chemical fertilizers and mosquito repellants are being used on a large scale.

Select the correct answer from the codes given below :

Codes :

U.P. Lower Sub. (Pre) 2002