Very recently, in which of the following countries having lakhs of people either suffered from severe famine/acute malnutrition or died due to starvation caused by war/ethnic conflicts?

In recent years, the world has faced a significant food crisis. According to the FAO, approximately 20 million people in Yemen, Nigeria, South Sudan, and Somalia have suffered from severe famine or acute malnutrition, or have died due to starvation caused by war and ethnic conflicts.

Yemen and South Sudan are the correct answer from the given options.