The British established the Anchal system (postal service) in Travancore under the guidance of:

The correct answer is: C) Colonel Munro

The Anchal system (postal service) was established in Travancore by the British under the guidance of Colonel Munro. Munro was a British officer who served as the Resident of Travancore from 1792 to 1799. He was responsible for introducing a number of reforms in Travancore, including the establishment of the Anchal system.

The Anchal system was a postal system that was based on the use of runners. Runners would carry messages from one place to another, and they would be paid according to the distance they traveled. The Anchal system was a very efficient way of communicating, and it helped to improve the administration of Travancore.

The other options are incorrect because:

• Velu Thampi Dalawa was a Malayali warrior who fought against the British in the Travancore-Kochi War of 1808-1809.
• General Cullen was a British officer who served as the Resident of Travancore from 1810 to 1814.
• Raja Kesavadas was a Malayali nobleman who served as the Dewan of Travancore from 1790 to 1792.