The correct option is E (a) is false; but (b) and (c) are true
Dicot root shows radial vascular bundles, i.e., vascular bundles arranged in a ring. In this type of vascular bundle, the xylem and phloem are situated at different radii. Xylem is of exarch type, i.e., protoxylem is away from centre and metaxylem is towards centre. Hence, statement (a) is wrong.
The innermost layer of cortex in a dicot root is endodermis. It completely surrounds the stele. It consists of single layer of barrel shaped cells which lack intercellular spaces. Hence, statement (b) is correct.
In a dicot root, the phloem masses are separated from the xylem by conjunctive tissues. Later, vascular cambium forms from this conjunctive tissue. Hence, statement (c) is correct.
Thus, the correct answer is '(a) is false; but (b) and (c) are true'.