Stone cells is the alternative name of:
A. Cortical fibres are the extraxylary fibres present in cortex.
B. Sclereids are excessively thick walled short sclerenchyma cells also known as stone cells.
C. Xylary fibres are the sclerenchyma fibres present in the xylem.
D. Phloem fibres are the sclerenchyma fibres present in the phloem.
So,the correct answer is option B.