Which of the following is an example of an oxymoron?

An oxymoron is a figure of speech in which two seemingly contradictory or opposing words or ideas are combined to create a new, often thought-provoking meaning. Each of the examples provided demonstrates this concept effectively.

"Living dead" juxtaposes the terms "living," which implies vitality, and "dead," which suggests a lack of life. This combination evokes a paradoxical image commonly used in literature and film, particularly in the context of zombies or other supernatural entities.

"Beautiful chaos" brings together "beautiful," which denotes aesthetic appeal, and "chaos," signifying disorder or confusion. The phrase suggests that within disorder, there can be beauty, prompting the audience to consider complex perceptions of experiences.

"Bittersweet" merges "bitter," associated with unpleasantness or pain, and "sweet," linked to pleasure or delight. This term conveys the complexity of emotions, reminding us that some experiences can evoke both happiness and sadness simultaneously.

Given that each of these phrases embodies the essence of an oxymoron, it is accurate to state that all of the examples are valid instances of this literary device.