Q1. With reference to the history of blue pigments, consider the following statements: Which of the statements given above are correct?
- Egyptian Blue is a calcium copper silicate compound and is regarded as one of the earliest known synthetic pigments.
- Prussian Blue is a coordination compound containing iron and cyanide.
- Natural ultramarine pigment is extracted from the copper-bearing mineral malachite.
- Indigo is a plant-derived blue dye whose chemical structure was determined by Adolf von Baeyer.
- A. 1, 2 and 3 only
- B. 1, 2 and 4 only
- C. 2, 3 and 4 only
- D. 1, 3 and 4 only