Scientists have succeeded in recovering healthy sugarcane plants from a diseased one

Scientists have succeeded in recovering healthy sugarcane plants from a diseased one.
(a)Name the part of the plant used as explant by the scientists.
(b)Describe the procedure the scientists followed to recover the healthy plants.
©Name this technology used for crop improvement.

(a) Meristem(apical,axillary).
(b) Explant/Virus free meristem is grown in nutrient medium, under aseptic conditions, tissue peoliferates to form undifferentiated mass/ callus, transferred to a medium containing auxins and cytokinins.
©Tissue culture/ micropropagation.