With reference to 'fly ash' produced by the power plants using coal as fuel, which of the following statements is/are correct?

1. It is emitted along with flue gases during the burning of coal in a furnace and collected using electrostatic precipitators.

2. Fly ash can be used in the production of bricks for building construction.

3. Maharashtra was the first state to adopt the Fly Ash utilisation policy.

Select the correct answer using the codes given below.