<prompt>  A patient of 8years-old attends your clinic he has classI incisor relation upper and lower incisors shows slight crowding. Right upper and left lower primary first molarsrecently extracted due to caries line of treatment isExtraction of Left upper and right lower primary first molars to relieve crowdingExtract all primary canines to relive crowdingFix space maintainersAwait until premolar erupt 