In the given flow chart, the flow of water is shown from soil to xylem of the root. Identify the tissues involved in steps A and B.

Water and minerals are absorbed by root hairs. Water moves radially through the root before it begins its ascent towards the leaf. It moves through different tissue of the root in apoplastic and symplastic manner. Water enters the root through the root hair, travel through the cortex in an apoplastic manner., reaches the endodermis, the presence of casparian strips prevent apoplastic movement through endodermis. From here it travels symplastically through pericycle, protoxylem (exarch condition of root) to metaxylem and then ascends upwards. So, the correct answer is 'A-Endodermis; B-Protoxylem'