Option 1: This statement is incorrect. The Act V of 1843 did not give masters the right to willfully keep their slaves tied to their estates. In fact, the act aimed to abolish slavery in India and provide certain rights to the slaves.

Option 2: This statement is correct. The Act V of 1843 denied the masters the use of courts to assert their claims on slaves. This meant that masters could no longer use the legal system to maintain ownership and control over their slaves.

Option 3: This statement is incorrect. The Act V of 1843 did not involve the Law Courts and masters working jointly in resolving cases of desertion. The act focused on the rights and freedom of the slaves, not on collaboration between masters and the law courts.

Option 4: This statement is incorrect. The Act V of 1843 did not result in the slaves becoming owners of the land. The act primarily dealt with the legal status and rights of slaves, not land ownership.

In conclusion, the correct statement about the Act V of 1843 is option 2. It denied masters the use of courts to assert their claims on slaves.