Which is true about `Psi` :-

Options

A. `Psi` represented the probability of finding an electron around the nucleus
B. `Psi` represent the amplitude of the electron wave
C. Both A and B
D. None of these

Explanation

To determine which statement about Psi (the wave function) is true, let's analyze each option step by step.

### Step 1: Understanding Psi
Psi (Ψ) is known as the wave function in quantum mechanics. It is a mathematical function that describes the quantum state of a particle, such as an electron in an atom.

### Step 2: Analyzing Option A
The first statement claims that "Psi represents the probability of finding an electron around the nucleus."
- This statement is **incorrect**. The probability of finding an electron in a certain region around the nucleus is actually given by the square of the wave function, denoted as |Ψ|². Therefore, this option is not true.

### Step 3: Analyzing Option B
The second statement claims that "Psi represents the amplitude of the electron wave."
- This statement is **correct**. Psi itself can be interpreted as the amplitude of the wave function. In quantum mechanics, the amplitude of the wave function relates to the probability density of finding a particle in a given location.

### Step 4: Analyzing Option C
The third option states "Both A and B."
- Since we have established that option A is incorrect, this option is also **incorrect**.

### Step 5: Analyzing Option D
The fourth option states "None of A."
- Since we have established that option B is correct, this option is also **incorrect**.

### Conclusion
From the analysis, the only true statement about Psi is that it represents the amplitude of the electron wave. Therefore, the correct answer is:

**Correct Answer: Option B - Psi represents the amplitude of the electron wave.**

---