The best fibre of jute is? 1-secondary phloemof stem. 2-secondary xylem of stem. 3-ground tissue of stem. 4-cortex of stem

dear student
jute fibre is a  bast fibre  which is collected from the phloem of the plant so answer would be option 1: secondary phloem of stem.
bast fibres are also known as phloem fibre or skin fibres.
common sources of jute are hemp, flax etc.
Regards