Step 1: Doctrine of disqualification.
Under succession laws, if a person is disqualified from inheriting property (e.g., due to murder or civil disability), then such person is treated as non-existent for inheritance purposes.
Step 2: Effect on heirs of disqualified person.
The heirs of a disqualified person cannot claim inheritance through that person because the disqualified person transmits no interest.
Step 3: Conclusion.
Thus, option (b) is correct.