In this question, we are given a list of symbols (List I) and a list of important events in the life of Buddha (List II). We need to match the symbols with their corresponding events.

List I:

A. Elephant

B. Tree

C. Empty Throne

D. Horse

List II:

1. Renouncement of worldly pleasures

2. Birth of Buddha

3. Enlightenment

4. Representation of royalty

The correct matching according to the symbols and events provided is:

A (Elephant) - 2 (Birth of Buddha)

B (Tree) - 3 (Enlightenment)

C (Empty Throne) - 4 (Representation of royalty)

D (Horse) - 1 (Renouncement of worldly pleasures)

Therefore, the correct answer is option 4, where the matching is:

A B C D: 2 3 4 1