The correct option is
A Corchorus Bast fibre or skin fibre is a plant fibre collected from the phloem or bast surrounding the stem of certain, mainly dicotyledonous plants. They support the conductive cells of the phloem and provide strength to the stem. Most of the technically important bast fibres are obtained from herbs cultivated in agriculture, as for instance flax, hemp or ramie, but also bast fibres from wild plants, as stinging nettle and trees such as lime or linden, have been used to some extent.
Corchorus are also bast fibres. In Gossypium, fibres are from flower.
In Cocos, fibres are from outer shell of fruit.
In Agave, fibres are from leaves.
Thus, the correct answer is option A.