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| Q. |
Number of basic SI unit is . |
| A. | 4 |
| B. | 7 |
| C. | 6 |
| D. | 5 |
| Answer» B. 7 | |
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Explanation: International System of Units (SI) is the modern metric system of measurement and the dominant system of international commerce and trade. It has seven base units. |
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