AP ICET 2024 6th May 2024 Shift 1

Let's analyze the options:
- Oxygen, Nitrogen, and Carbon are all gaseous elements in the periodic table and are essential for life in various forms.
- Helium, while a gas, is inert and does not play a biological role like the others.
Thus, Helium is the odd one out as it does not participate in life-supporting processes like Oxygen, Nitrogen, and Carbon.
Therefore, the correct answer is 4 .
Quick Tip
When identifying the odd one out, consider the characteristics of each item, such as whether they share a common property or role.