MCQ
The chief source of aromatic compounds is :
- AFruits
- BOil of winter green
- ✓Petroleum
- DAnts
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$\left[\right.$ Given $: \mathrm{h}=6.63 \times 10^{-34} \,\mathrm{Js}$ and $\left.\mathrm{c}=3.0 \times 10^{8} \,\mathrm{~ms}^{-1}\right]$