The cartoon titled "The Clemency of Canning," published in Punch on 24 October 1857, depicts a satirical representation of Lord Canning's policy of clemency during the aftermath of the Revolt of 1857. The cartoon's caption, "Well, then they shan't blow him from nasty guns; But he must promise to be a good little sepoy," reflects the satirical tone. Here's the reasoning behind it:

Clemency Policy:

• Lord Canning, the Governor-General of India during the Revolt of 1857, pursued a policy of clemency towards the rebels.

Satirical Tone:

• The caption, "Well, then they shan't blow him from nasty guns," sarcastically portrays the idea that rebels were spared from execution by cannons.

"Good Little Sepoy":

• The phrase "But he must promise to be a good little sepoy" suggests a patronizing attitude, as if the rebels were being treated like children who needed to promise good behavior.

Punch Magazine:

• Punch, a British satirical magazine, often used cartoons and illustrations to comment on contemporary events, including political and colonial matters.

So, the correct option is [3].