Step 1: Principle of disclosure.
Under the Transfer of Property Act, the seller must disclose material defects in the property known to him.
Step 2: Application.
Here, A conceals the existence of a right of way (an encumbrance), which is a material defect.
Step 3: Legal effect.
Such concealment gives the buyer (B) the right to rescind the contract.
Step 4: Conclusion.
Therefore, the correct answer is (A).
Match List-I with List-II 