Step 1: Recall Buddhist symbols.
White elephant symbolizes Buddha’s conception (his mother’s dream).
Horse (Kanthaka) symbolizes the Great Renunciation when Buddha left home.
Tree (Bodhi tree) symbolizes his enlightenment at Bodh Gaya.
Wheel (Dharmachakra) symbolizes his first sermon at Sarnath.
Step 2: Arrange in order.
First → White elephant (B) (conception).
Second → Horse (C) (renunciation).
Third → Tree (A) (enlightenment).
Fourth → Wheel (D) (first sermon).
Step 3: Verify sequence.
This order is B → C → A → D.
Step 4: Conclusion.
Correct answer is (C) B, C, A, D.