Explanation:

- The International Campaign to Abolish Nuclear Weapons (ICAN) won the 2017 Nobel Peace Prize for its efforts to draw attention to the catastrophic humanitarian consequences of any use of nuclear weapons and its groundbreaking work to achieve a treaty-based prohibition of such weapons.

- Option:1, Berne, Switzerland – Berne is the capital of Switzerland but not the location of ICAN’s headquarters.

- Option:2, Geneva, Switzerland – Geneva is known for hosting numerous international organizations, including ICAN.

- Correct Answer: Option 2 – Geneva, Switzerland.

- Option:3, Paris, France – Paris is not the location of ICAN’s headquarters.

- Option:4, London, UK – London is a major global city but not relevant for ICAN’s headquarters.

- Option:5, None of the above – Incorrect since ICAN is based in Geneva.