All of the following are vitamin B except

Options

A. ascorbic acid
B. cobalamin
C. niacin
D. pantothenic acid

Answer

To solve the question "All of the following are vitamin B except," we need to identify which of the given options is not classified as a vitamin B. Here’s a step-by-step solution:

### Step 1: Understand the Question
The question asks us to identify which vitamin among the given options is not part of the vitamin B complex.

### Step 2: List the Options
Assuming the options provided are:
- A) Ascorbic Acid
- B) Cobalamin
- C) Niacin
- D) Pantothenic Acid

### Step 3: Identify Each Vitamin
Now, we will identify each option:
- **Ascorbic Acid**: This is known as Vitamin C. It is not a part of the vitamin B complex.
- **Cobalamin**: This is Vitamin B12, which is part of the vitamin B complex.
- **Niacin**: This is Vitamin B3, which is also part of the vitamin B complex.
- **Pantothenic Acid**: This is Vitamin B5, which is again part of the vitamin B complex.

### Step 4: Conclusion
From the identification:
- The only option that is not a vitamin B is **Ascorbic Acid** (Vitamin C).

Thus, the correct answer is **A) Ascorbic Acid**.