MCQOPTIONS
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| 1. |
Which of the following statements is true? (a) Indigo-blue is a natural dye. (b) Alizarin is a synthetic dye. |
| A. | Both true |
| B. | (a) true, (b) false |
| C. | (a) false, (b) true |
| D. | Both false |
| Answer» B. (a) true, (b) false | |