Consider the following statements:
In solid waste management
1. Density separation of solid wastes can be accomplished by air classifiers.
2. Iron recovery from solid wastes can be done by magnetic separators.
3. Aluminium separation from solid wastes can be accomplished by eddy current separators.
Which of the statements given above are correct?

Correct option is D

All three statements are correct:
Density separation of solid wastes can indeed be accomplished by air classifiers, which use airflow to separate materials based on their density differences.
Magnetic separators are used to recover iron and other ferrous materials from solid wastes by utilizing the magnetic properties of the material.
Eddy current separators are used for the separation of non-ferrous metals such as aluminum from solid wastes. These separators work by inducing eddy currents, which create a magnetic field that repels non-ferrous metals.
Therefore, the correct answer is (d) 1, 2 and 3.