Add the correct punctuation mark from the given options.

Oh_______ What a beautiful flower.

The correct answer is: Exclamation mark (!)

Exclamation marks (!) are used at the end of a statements when a strong emotion is being expressed (good and bad - surprise, excitement or delight, but also anger, fear or shock), and tell a reader to add emphasis to a sentence. They might also suggest that a speaker is shouting. 'Oh! What a beautiful flower. Here exclamation mark is used to end of the statement (oh) to indicate strong emotion.