The correct answer is B) Saum.
The Pillard of Islam that involves fasting during the month of Ramadan is Saum.
During this period of the year, Muslims must fast form the early hours in the morning until the end of the day.
The other four Pillars of Islam are the following. The Sahada or the profession of faith. The Salat or daily prayers at different times of the day. The Zakat or sharing own richness with the poor. And Hajj or the pilgrimage to Mecca. All Muslims are obligated to make a pilgrim to Mecca at least one time in their lives.
