Which of the following is not a type of current ?

Options

A. Steady Direct Current
B. Alternating Current
C. Variable DC
D. Parallel Current

Explanation

To solve the question "Which of the following is not a type of current?", we will analyze the given options and identify the correct answer step by step.

### Step 1: Understand the Types of Current
There are three main types of electric current:
1. **Steady Direct Current (DC)**: In this type, both the direction and magnitude of the current remain constant over time.
2. **Variable Direct Current (DC)**: Here, the direction of the current remains constant, but the magnitude changes over time.
3. **Alternating Current (AC)**: In this type, both the direction and magnitude of the current vary with time.

### Step 2: Analyze the Given Options
The options provided are:
- A) Steady Direct Current
- B) Alternating Current
- C) Variable Direct Current
- D) Parallel Current

### Step 3: Identify the Incorrect Option
Now, we will check each option against the known types of current:
- **Option A (Steady Direct Current)**: This is a recognized type of current.
- **Option B (Alternating Current)**: This is also a recognized type of current.
- **Option C (Variable Direct Current)**: This is a recognized type of current as well.
- **Option D (Parallel Current)**: This is not a recognized type of current in the context of electric current types.

### Conclusion
Since "Parallel Current" is not a recognized type of current, the correct answer to the question is:
**Option D: Parallel Current**

---