Which of the following leads to carbon-carbon double bond?

Which of the following leads to carbon-carbon double bond?
  1. $1^{\circ}$ Amine $+\mathrm{RCHO} ightarrow$
  2. $2^{\circ}$ Amine $+\mathrm{R}_{2} \mathrm{CO} ightarrow$
  3. $2^{\circ}$ Amine $+\mathrm{RCHO} ightarrow$
  4. Both (b) and (c)

Solution

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Asked in: JEE-TOPICTESTS-CHEMISTRY

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