When does the doctrine of "Quantum Meruit" apply in contracts?

The correct answer is Option 4

Key Points Quantum meruit is Latin phrase related to Indian Contract Act, 1872 which means “What one has earned” or “as much as he earned” Quantum meruit means a demand for a justifiable sum in relation to services or commodities provided to the defendant Thus, the law of quantum meruit means a promise to pay a reasonable fee for the labour and materials provided even if there is no explicit contract.