Reimer -Tiemann reaction involves a

Options

A. `:CHCI`
B. `.^(+)CHCI_(2)`
C. `:C Cl_(2)`
D. `.C Cl_(3)`

Explanation

**Step-by-Step Solution:**

1. **Understanding the Reimer-Tiemann Reaction:**
The Reimer-Tiemann reaction is a chemical reaction that involves the ortho-formylation of phenols. It typically uses chloroform (CHCl3) in the presence of a strong base, usually sodium hydroxide (NaOH).

2. **Identifying the Reactants:**
In the Reimer-Tiemann reaction, the reactants are chloroform (CHCl3) and a phenol. The strong base (NaOH) is used to generate a reactive intermediate.

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