MCQ
The most available element in earth crust is :
- ✓Si
- BAl
- CZn
- DFe
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$\text{CH}_3\text{CHO}\xrightarrow[(\text{ii})\ \text{H}_2\text{O}]{(\text{i})\text{CH}_3\text{MgBr}}\text{A}\xrightarrow{\text{H}_2\text{SO}_4.\triangle}\text{(B)}\xrightarrow{\text{Hydroboration oxidation}}\text{(C)}$