MCQ
Which of the following is a macronutrient?
- ACopper
- ✓Magnesium
- CBoron
- DMolybdenum
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| Object | Density $(kg/m^3)$ | Volume $(m^3)$ | Mass $(kg)$ |
| $A$ | $-$ | $2$ | $4000$ |
| $B$ | $8000$ | $4$ | $-$ |
| $C$ | $2000$ | $-$ | $1000$ |
| $D$ | $-$ | $4$ | $2000$ |