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A bicollateral vascular bundle has the following arrangement of tissues.

Outer Phloem - Outer Xylem - Middle Cambium - Inner Xylem - Inner Phloem.
Outer Xylem - Outer Cambium - Middle Phloem - Inner Cambium - Inner Xylem.
Outer Phloem - Outer Cambium - Middle Xylem - Inner Cambium - Inner Phloem.
Outer Cambium - Outer Phloem - Middle Xylem - Inner Phloem - Inner Cambium.
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