Identify the correct sentence.
a.
though napoleon was a great general and he was also very arrogant.

b.
napoleon was a great general, he was very arrogant.

c.
napoleon was a great general, but he was very arrogant.

d.
napoleon was a great general he was very arrogant.

The correct answer is C. Napoleon was a great general, but he was also very arrogant.

Explanation:

In the sentence there are two contrasting ideas: Napoleon is a great general-He is arrogant.

These two must be joined by a coordinating conjunction that can show the contrastive relationship between them. 'But' is the right choice because it's the one coordinating conjunction that shows contrast when joining independent clauses.