Explanation:

- He walked slowly though his bandaged leg.

- "Though" implies a contrast or something unexpected. The sentence structure doesn’t fit well with "though."

- He walked slowly because of his bandaged leg.

- "Because of" indicates a reason. It explains why he walked slowly, which is due to his bandaged leg.

- He walked slowly although his bandaged leg.

- "Although" is similar to "though," generally used to introduce a subordinate clause. This structure doesn't fit here.

- He walked slowly in spite of his bandaged leg.

- "In spite of" suggests doing something regardless of a difficulty. It implies he managed to walk slowly despite having a bandaged leg.