Explanation:

- Theft (Option 1): Involves taking someone’s property without consent and with intent to permanently deprive them of it. No violence or threat is involved.

- Robbery (Option 2): Involves taking property from someone with the intention to permanently deprive them of it, using violence or threats.

- Dacoity (Option 3): Similar to robbery but committed by a group (five or more people).

- Extortion (Option 4): Involves obtaining property through coercion or threats, not necessarily involving immediate violence or confrontation.

Correct Answer: Robbery

Robbery is the right choice as A uses a threat of violence to make B deliver his purse. .