which of these nebulae is the odd one out?

Among the images of nebulae given, the odd one out of them is image D.
A nebula refers to a low-density cloud of dust and interstellar gases such as hydrogen and helium. Also, some of the characteristics of a nebula includes the following;
Based on the images of nebulae given, the odd one out of them is image D because it doesn't contain interstellar gases.
Read more on nebula here: brainly.com/question/19530940