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Great job ur ans r correct but I'm confused y there is hydrogen bond with non polar molecule?
Water is attracted to lignin in the cell walls of Xylem vessels through 'Adhesion' which means it is attracted to lignin in cell walls of xylem vessels through hydrogen bonds with the help of their cohesive property. Lignin has both hydrophobic and hydrophilic groups in it. hope this helps!
"This process is known as mass flow - as long with the fact that water molecules move together as a body of water - aided by water's property of being cohesive, and attracted to the lignin in the walls of the xylem vessels, known as adhesion." from https://en.wikibooks.org/wiki/A-level_Biology/Transport/multicellular_plants