Fascicular cambium is the primary meristematic tissue present between the xylem and phloem of a vascular bundle. As it is located between the xylem and phloem, fascicular cambium is also known as intrafascicular cambium. It develops from the procambium of the stem apex.
The fascicular cambium or vascular cambium is a thin strip of primary meristem that is present in between the phloem and xylem in the case of dicotyledonous stems. These cells are thin walled and rectangular in shape.
Hence, the correct answer is option “A” - Only dicots.