The British suppressed revolts in Malabar using brutal tactics, including public executions known as:

The correct answer is: A) Thuppakki Shastra.

Thuppakki Shastra is a form of public execution used by the British in Malabar during the 19th century. It involved tying the victim to a stake and then shooting them with a cannon. The practice was used to suppress revolts and to intimidate the local population.

The other options are incorrect.

• Mamankam Shastra is a martial art from Kerala.
• Nari Charitram is a biography of a woman.
• Marumakkal Vazhcha is a festival celebrated in Kerala.