Choose the alternative which best expresses the meaning of the Idiom/Phrase.
To set the Thames on fire

Do a heroic deed

The idiom "to set the Thames on fire" means to do something amazing or extraordinary. It is often used to describe someone who is very talented or successful.

The other options do not have the same meaning.

• Do a heroic deed means to perform an act of bravery or courage.
• To burn someone means to physically harm them with fire.
• Destroy someone means to ruin or cause them to fail.
• To be selfish means to put your own needs and wants ahead of the needs and wants of others.

So, the answer is Do a heroic deed.