TRUE statement regarding Hammett reaction constant (ρ) for the following transformations given in equations A and B is

Concept:-

Curtin Hammett Principle:

• It is applicable to reactions in which two substrates ( which are in equilibrium with each other) produce two different products.
• The stereoselectivity of the reaction depends upon the relative energies of transition states not on the starting material.
• Hammett reaction constant (ρ) and the Hammett substitution constant explains the effect of EWG and EDG on the intermediates of a reaction.

It follows the reaction 

• The Hammett reaction constant: It is also called the sensitivity constant which is used to determine the electronic strength between the reactant and the intermediate.

Explanation:-

• If ρ= +ve, then the intermediate has more electrons than the starting materials.
•  ρ=-ve,  then the intermediate has fewer electrons than the starting materials.

In equations A and B the conjugate acids are  and respectively.

• Here in the second case, the acid group is away from the benzene ring to which the ρ value is lesser than that of the aryl carboxylic acid group.

Conclusion:-

Hence option 3 is the correct option.