Which modified leaf prevents transpiration?

The correct option is B Spine
A) Tendrils are the modification of leaves that help climbers to climb the support.

C) Spine is the modified structure of the entire leaf or part of it that prevents transpiration in plants.

C) Leaf pitcher is the modification of leaf which takes part in catching and digesting small animals.

D) Cladode is the modification of a stem to perform photosynthesis.

So, the correct option is 'Spine'.