Step 1: Apoptosis is programmed cell death in which a cell shrinks, the chromatin condenses, and the cell breaks into membrane-bound, eosinophilic apoptotic bodies that are engulfed by neighbouring cells.
Step 2: Councilman bodies (also called acidophilic or apoptotic bodies) are the apoptotic remnants of hepatocytes seen in acute viral hepatitis and yellow fever. They are a classic histological example of apoptosis, so option a is correct.
Step 3: Gamna Gandy bodies are organised foci of haemorrhage with fibrosis, calcium and iron deposition seen in a congested spleen, not apoptosis.
Step 4: Russell bodies are accumulations of immunoglobulin within plasma cells and represent a secretory or storage phenomenon, not apoptosis. Hence Councilman bodies are the correct example.