Consider the following statements :
1.Glycerol is used in explosives.
2.Detergents are made from hydrocarbons obtained from coal
or petroleum.
3.Sodium perborate is a mild bleaching agent.
4.Methanol is used for making synthetic fibres.
Which of the statements given above are correct ?
(a) 1, 2, 3 and 4
(b) 1, 2 and 3
(c) 2, 3 and 4
(d) 1 and 4
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