In an FCC unit cell, atoms are present at the 8 corners of the cube (each contributing \(1/8\) atom) and at the centers of all 6 faces (each contributing \(1/2\) atom). The total number of lattice points is:
\[\text{Total} = 8 \times \frac{1}{8} + 6 \times \frac{1}{2} = 1 + 3 = 4\]
Match Fibre with Application.\[\begin{array}{|l|l|} \hline \textbf{LIST I} & \textbf{LIST II} \\ \textbf{Fibre} & \textbf{Application} \\ \hline \hline \text{A. Silk fibre} & \text{I. Fire retardant} \\ \hline \text{B. Wool fibre} & \text{II. Directional lustre} \\ \hline \text{C. Nomex fibre} & \text{III. Bulletproof} \\ \hline \text{D. Kevlar fibre} & \text{IV. Thermal insulation} \\ \hline \end{array}\]