Step 1: Understanding the Ashoka Pillar.
The Ashoka Pillar at Sarnath features four animals — a lion, an elephant, a bull, and a horse — symbolizing different stages of Lord Buddha’s life.
Step 2: Explanation.
The tiger is not depicted on the Ashokan capital. The lions stand back to back representing power, courage, and confidence, and form India’s national emblem.
Step 3: Conclusion.
Therefore, the animal not depicted in the Ashoka Pillar is the tiger.