If A and B have entered into a contract where A will supply Red boxes to B. but, A did a fault and did not supply the red boxes, then B did not made the payment as, the boxes were not supplied to him. A filed a suit in court mentioning that, B defaulted in payment of contract . The Court in this case can mention that here :
Plaintiff himself is a wrongdoer.
defendant himself is a wrongdoer.
Plaintiff himself is not a wrongdoer.
Plaintiff did not supply the boxes sue to some inevitable circumstances.
This principle of plaintiff himself is a wrongdoer, is frequently invoked in various legal disputes, including contract law, torts, and equity cases.Hence, option (a) is correct.