MCQOPTIONS
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| 1. |
'Hydrogen', 'Helium', 'Lithium', 'Beryllium' ]; console.log(materials.map (material => material.length)); |
| A. | [5,5,5,5] |
| B. | [5]{4} |
| C. | [5] |
| D. | Both A and B |
| Answer» B. [5]{4} | |