The process by which fibres are obtained from the stem of the plant is known as retting. These fibres can then be separated from the non-fibrous matter by hand. This process is known as stripping.

CORRECT ??

Dear student,
When the jute plant is in the flowering stage, it is harvested. After harvesting, it is kept submerged in water for a few days. During this period, the stem of the plant rots and the fibres (present in the stem) remain. The process by which fibres are obtained from the stem of the plant is known as retting. 
The physical process of separating components of a liquid mixture is known as stripping
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