BJP leader Shivraj Singh Chouhanwill be sworn in Madhya Pradesh chief minister for the fourth time at 9 pm on Monday.He was elected state BJP Legistature Party leader here in the evening.The legislature party members - wearing masks due to coronavirus threat and sitting two chairs away from each other - unanimously elected Chouhan as their leader.BJP's central observers Arun Singh and Vinay Sahasrabuddhe joined the meeting via video conferencing from Delhi.