The correct option is A tendrils
Both the stems and leaves are modified into spirally coiled structures for climbing called tendrils in certain plants.
In grapes, the tendrils are modified stems. In pea plants, the tendrils are modified leaves.
Thorns are modification of stems such as thorns in lemon.
Spines are modification of leaves such as in Opuntia.
Phylloclade is modification of stem to perform photosynthesis, such as thick, fleshy and succulent phylloclade in Opuntia and leaf like phylloclade in Ruscus.