Match List-I with List-II and select the correct answer using the code given below the Lists : List-I (Property) (Allotrope of Carbon) A. Graphite B. Diamond C. Fullerene D. Graphene List-II 1. Thinnest and strongest material 2. Hardest natural substance 3. Very light and strong material 4. Soft and slippery material Code : (a) A-4 B-2 C-3 D-1 (b) A-4 B-3 C-2 D-1 (c) A-1 B-3 C-2 D-4 (d) A-1 B-2 C-3 D-4

The correct matching of carbon allotropes with their properties is as follows:

• Graphite (A-4): It has a layered structure where layers are held by weak Van der Waals forces, allowing them to slide over each other, making it soft and slippery.
• Diamond (B-2): Due to its rigid three-dimensional tetrahedral covalent bonding, it is the hardest natural substance known.
• Fullerene (C-3): These are cage-like molecules (such as C60) that are very light and strong, often used in nanotechnology and specialized material engineering.
• Graphene (D-1): A single layer of carbon atoms arranged in a hexagonal lattice, it is recognized as the thinnest and strongest material discovered to date, possessing exceptional electrical and thermal conductivity.

Thus, the correct sequence is A-4, B-2, C-3, D-1, which corresponds to Option A.