Consider the following reactions: Which of these reactions are possible?

Consider the following reactions:









Which of these reactions are possible?

1. $\left(\mathrm{a}\right)$ and $\left(\mathrm{b}\right)$
2. $\left(\mathrm{a}\right)$ and $\left(\mathrm{d}\right)$
3. $\left(\mathrm{b}\right),\left(\mathrm{c}\right)$ and $\left(\mathrm{d}\right)$
4. $\left(\mathrm{b}\right)$ and $\left(\mathrm{d}\right)$

Asked in: JEE Main 2020 (07 Jan Shift 2)

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