UPSC Prelims GS - 2020

Question 99
EASYCorrect: +2Incorrect: -2

Consider the following statements:
1. Coal ash contains arsenic, lead and mercury.
2. Coal-fired power plants release sulphur dioxide and oxides of nitrogen into the environment.
3. High ash content is observed in Indian coal.
Which of the statements given above is/are correct?

    a
    1 only
    b
    2 and 3 only
    c
    3 only
    d
    1, 2 and 3