MCQ
The characteristic grouping of secondary alcohols is
- A$ - C{H_2}OH$
- ✓$>CHOH$
- C$ - \mathop C\limits_|^| - OH$
- D


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$\mathrm{C}\mathrm{H}_{3} -\mathrm{C} \equiv \mathrm{CH} \xrightarrow[873\;K]{\text { red hot iron tube}} \mathrm{A}$
the number of sigma$(\sigma)$ bonds present in the product $A$ is