Q. Which of the following is correctly punctuated 
1. What a beautiful morning!
2. How old are you?

Both the sentences are correctly punctuated.
There are three common punctuation marks that come at the end of a sentence: the period ( . ), the question mark ( ? ), and the exclamation point ( ! ).
A question mark comes at the end of a question. A question is a request for information. The information requested should be provided in the form of an answer.
The exclamation point is a punctuation mark usually used to indicate strong feelings or high volume, and often marks the end of a sentence.

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