Incorrect Pair: Phyllode - Asparagus

Explanation:
Phyllode is a modified leaf found in certain plants, particularly in some species of Acacia. It is flattened and leaf-like in appearance, lacking a petiole and having a widened petiole that functions as a leaf blade. Phyllodes perform photosynthesis and take over the function of the true leaves. They are generally long, narrow, and lanceolate in shape.

On the other hand, Asparagus is a type of plant that possesses true leaves. The leaves of Asparagus are small, needle-like structures known as cladodes. Cladodes are modified stems that resemble and function as leaves. Unlike phyllodes, cladodes do not perform photosynthesis and instead serve as organs for water storage and support.

Now let's look at the given options:

a) Phylloclade - Opuntia: This is a correct pair. Opuntia, commonly known as prickly pear cactus, possesses flattened stems called phylloclades that function like leaves. These modified stems carry out photosynthesis and serve as the primary site for the plant's metabolic activities.

b) Cladode - Ruscus: This is a correct pair. Ruscus, also known as butcher's broom, has flattened stems called cladodes that resemble leaves. These modified stems lack true leaves and perform photosynthesis. Cladodes in Ruscus aid in photosynthesis and carry out other metabolic functions.

c) Phyllode - Asparagus: This is an incorrect pair. Asparagus possesses true leaves in the form of needle-like cladodes, not phyllodes. Phyllodes are found in plants like Acacia, not Asparagus.

d) Stem tendrils - Grape vine: This is a correct pair. Grape vines produce thin, coiling structures called stem tendrils that serve the purpose of climbing and support. These tendrils are modified stems and help the grape vine in attaching to structures and other plants for support.

In conclusion, the incorrect pair in the given options is c) Phyllode - Asparagus, as Asparagus does not possess phyllodes but rather needle-like cladodes.