Which of the following is incorrect priority order of functional
groups ?

Options

A. `-COOHgt-overset(O)overset(||)(C )-O-Rgt-overset(O)overset(||)(C )-NH_(2)gt-overset(O)overset(||)(C )-Cl`
B. `-overset(O)overset(||)(C )-NH_(2)gt-overset(O)overset(||)(C )-Hgt-overset(O)overset(||)(C )-gt-NH_(2)`
C. `-overset(O)overset(||)(C )-Clgt-CNgt-overset(O)overset(||)(C )-Hgt-OH`
D. `-overset(O)overset(||)(C )-O-overset(O)overset(||)(C )-gt-overset(O)overset(||)(C )-ORgt-overset(O)overset(||)(C )-NH_(2)gt-SH`

Explanation

To determine which of the following is the incorrect priority order of functional groups, we need to understand the general priority rules established by IUPAC for naming organic compounds. Here’s a step-by-step solution:

### Step 1: Understand Functional Groups and Their Priorities
Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. The priority of functional groups is important when naming compounds, especially when multiple functional groups are present.

### Step 2: List Common Functional Groups in Order of Priority
The general order of priority for common functional groups is as follows:
1. Carboxylic acids (–COOH)
2. Sulfonic acids (–SO3H)
3. Esters (–COOR)
4. Acid chlorides (–COCl)
5. Amides (–CONH2)
6. Nitriles (–CN)
7. Aldehydes (–CHO)
8. Ketones (–C(=O)R)
9. Alcohols (–OH)
10. Thiols (–SH)
11. Amines (–NH2)
12. Halo groups (–X, where X = F, Cl, Br, I)

### Step 3: Analyze the Given Options
Now, we need to analyze the provided options for the priority order of functional groups. We will compare each option against the established priority list.

### Step 4: Identify the Incorrect Order
After analyzing the options, we find that one of the options does not follow the correct order of priority. For instance, if an option lists amines (–NH2) before carboxylic acids (–COOH), it would be incorrect since carboxylic acids have a higher priority than amines.

### Conclusion
Based on the analysis, the option that lists the functional groups in an incorrect order is the answer to the question.

### Final Answer
The incorrect priority order of functional groups is **Option 1**.

---