MCQ
The osmotic pressure of a solution is given by the relation
- A$P = \frac{{RT}}{C}$
- B$P = \frac{{CT}}{R}$
- C$P = \frac{{RC}}{T}$
- ✓$\frac{P}{C} = RT$
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Statement $I$ : Acidity of $\alpha$-hydrogens of aldehydes and ketones is responsible for Aldol reaction.
Statement $II$ : Reaction between benzaldehyde and ethanal will $NOT$ give Cross - Aldol product. In the light of above statements, choose the most appropriate answer from the options given below.

The order of decreasing reactivities of these alcohols towards substitution with $HBr$ is