The correct option is B Adventitious roots
Prop roots are modified adventious or pillar roots. They grow downwards from the branches of tree and support the heavy branches of tree. When the adventitious roots are modified for aerial support is called as prop roots. Prop roots give mechanical support to the aerial branches.
Aerial roots are roots above the ground. They are found in diverse plant species, including orchids, mangroves, banyan trees, rainforest. The lateral branches grow vertically downward into the soil and act as pillars.
Thus, the correct answer is option B.