The rulers of Kapurthala State were known for their:

The correct answer is: b) Patronage of arts and architecture.

The rulers of Kapurthala State were known for their patronage of arts and architecture. They built many beautiful palaces, forts, and temples in the state. They also supported many artists and musicians.

The other options are incorrect.

• Option a) is incorrect because the rulers of Kapurthala State were not known for their military prowess. They were not involved in any major wars.
• Option c) is incorrect because the rulers of Kapurthala State were not known for their progressive social reforms. They did not introduce any major social reforms in the state.
• Option d) is incorrect because the rulers of Kapurthala State were not known for their diplomatic alliances. They did not have any major diplomatic alliances with other states or countries.

Here are some examples of the palaces, forts, and temples that were built by the rulers of Kapurthala State:

• The Moti Mahal Palace is a beautiful palace that was built in the 19th century. It is now a museum.
• The Qila Mubarak is a fort that was built in the 16th century. It is now a tourist attraction.
• The Gurdwara Dukh Niwaran Sahib is a temple that was built in the 18th century. It is one of the most important Sikh temples in the state.