What event severely affected painting activity around 1805 in Kangra?

The Gurkhas besieging the Kangra fort

The correct answer is Option 2- The Gurkhas besieging the Kangra fort

During Sansar Chand’s reign, the production of Kangra School was far greater than any other hill state. He exercised wide political power and was able to support a large studio with artists from Guler and other areas. The Kangra style soon spread from Tira Sujanpur to Garhwal in the east and Kashmir in the west. Painting activity was severely affected around 1805 when the Gurkhas besieged the Kangra fort and Sansar Chand had to flee to his hill palace at Tira Sujanpur. In 1809, with the help of Ranjit Singh, the Gurkhas were driven away. Though Sansar Chand continued to maintain his atelier of artists, the work no longer paralleled masterpieces of the period 1785–1805.