The correct option is
C Three or more leaves are arranged at each node
The pattern of arrangement of leaves on the stem is called phyllotaxy.
In alternate phyllotaxy, consecutive leaves are produced in a spiral manner around the stem.
In opposite phyllotaxy, the leaves are arranged in pairs on either side of the same node.
In whorled phyllotaxy, more than two leaves occur at a node.
So, the correct answer is 'Three or more leaves are arranged at each node'