Step 1: Understanding the diagram.
The diagram represents a tissue section with various types of cells. In such diagrams, the P and Q indicate different cellular structures.
Step 2: Analyzing the options.
(A) P - Medulla; Q - Macrophage: Incorrect — This does not match the appearance of the cells shown in the diagram.
(B) P - Cytoplasm; Q - Fibroblast: Incorrect — The diagram does not indicate cytoplasm and fibroblasts clearly.
(C) P - Matrix; Q - Mast cell: Incorrect — This does not match the appearance of the tissue cells.
(D) P - Matrix; Q - Adipocyte: Correct — The cells are identified correctly based on the structure shown in the diagram.
Step 3: Conclusion.
The correct answer is (D) P - Matrix; Q - Adipocyte, as the P is the matrix and Q is identified as adipocyte in the diagram.