The correct answer is option 'A', the Prevention of Terrorism Bill.

Explanation:
The Prevention of Terrorism Bill is a legislation that is introduced in the Parliament to address and prevent acts of terrorism in the country. It is a crucial bill that requires the approval and support of both the Houses of Parliament - the Lok Sabha (Lower House) and the Rajya Sabha (Upper House) - in order to become law.

Deadlock in Passing a Bill:
Sometimes, there can be a deadlock in the passing of a bill in the Parliament. This occurs when there is a disagreement or conflict between the two Houses on certain provisions or aspects of the bill. In such cases, both Houses may have differing opinions or concerns that need to be resolved before the bill can proceed.

Resolution of Deadlock:
To resolve the deadlock, a Joint Sitting of both Houses is called. A Joint Sitting is a special session of Parliament where Members from both the Lok Sabha and the Rajya Sabha come together to discuss and deliberate on the bill. The aim of the Joint Sitting is to find a consensus and reach an agreement on the disputed provisions of the bill.

Importance of Consensus:
Consensus is crucial in the passing of any bill. It ensures that the concerns and viewpoints of all Members of Parliament are taken into consideration, leading to a more comprehensive and balanced legislation. Without consensus, it becomes difficult to pass a bill as it requires the support and approval of a majority of Members present and voting in the Joint Sitting.

Prevention of Terrorism Bill:
In the given options, the Prevention of Terrorism Bill is the only bill mentioned. This bill deals with the critical issue of terrorism and is likely to generate differing opinions and concerns among Members of Parliament. If there is a deadlock in the passing of this bill, a Joint Sitting of both Houses would be called to resolve the deadlock and reach a consensus.

Conclusion:
In summary, the bill that enjoys the sitting of both the Houses due to deadlock is the Prevention of Terrorism Bill. This bill is of significant importance as it aims to address acts of terrorism in the country. A Joint Sitting is called to resolve any deadlock that may arise during the passage of the bill, ensuring that the concerns and viewpoints of all Members of Parliament are taken into consideration.