Explanation:

To determine the correct punctuation mark for the given sentence, we need to analyze the context and the emotion expressed in the sentence.

The sentence "I have won the game" indicates that the speaker is expressing excitement or joy about their accomplishment. Therefore, we need to select a punctuation mark that conveys this emotion.

Options:
a) Bravo! - This is a word used to express approval or admiration. It is often used to congratulate someone for a job well done.
b) Hurrah! - This is a word used to express excitement, joy, or triumph. It is often used to cheer or celebrate a victory.
c) Alas! - This is a word used to express sadness, disappointment, or regret. It is often used when something unfortunate or unexpected happens.
d) What! - This is a word used to express surprise, shock, or disbelief. It is often used when something unexpected or unusual occurs.

Analysis of Options:
a) Bravo! - This option does not accurately convey the emotion of excitement or joy that is expressed in the sentence. Therefore, it is not the correct punctuation mark.
b) Hurrah! - This option accurately conveys the emotion of excitement and joy. It is the correct punctuation mark for the given sentence.
c) Alas! - This option conveys a completely different emotion of sadness or disappointment. It is not the correct punctuation mark.
d) What! - This option conveys surprise or shock, but it does not accurately convey the emotion of excitement or joy. Therefore, it is not the correct punctuation mark.

Conclusion:
After analyzing the options and considering the context and emotion expressed in the sentence, the correct punctuation mark for the given sentence "I have won the game" is Hurrah! This punctuation mark accurately conveys the excitement and joy of the speaker's accomplishment.