Explanation:

Minsk Agreements

Minsk I: Ukraine and the Russian-backed separatists agreed a 12-point ceasefire deal in the capital of Belarus in September 2014.

• Its provisions included prisoner exchanges, deliveries of humanitarian aid and the withdrawal of heavy weapons.
• The agreement quickly broke down, with violations by both sides.

Minsk II: In 2015, an open conflict was averted after the ‘Minsk II’ peace agreement was signed, under the mediation of France and Germany.

• It was designed to end the fighting in the rebel regions and hand over the border to Ukraine’s national troops.
• It was signed by Representatives of Russia, Ukraine, the Organisation for Security and Cooperation in Europe (OSCE) and the leaders of two pro-Russian separatist regions.
• OSCE is the world's largest security-oriented intergovernmental organisation. Its mandate includes issues such as arms control, promotion of human rights, freedom of the press, and fair elections.

Hence option 4th is correct.