Select the correct statement(s).

Options

A. Due to the pairing of electrons, magnetic moment is cancelled
B. Paramagnetic substances are weakly attracted by magnetic field
C. Ferromagnetic substances cannot be magnetised permanently
D. The domains in anti-ferromagnetic substances are oppositely oriented with respect to each other

Explanation

To solve the question "Select the correct statement(s)", we will analyze each statement provided in the options one by one.

### Step-by-Step Solution:

1. **Analyzing Option 1:**
- Statement: "Due to the pairing of electrons, magnetic moment is cancelled."
- Explanation: The magnetic moment (μ) is calculated using the formula μ = √(n(n + 2)), where n is the number of unpaired electrons. If electrons are paired, then n = 0, leading to a magnetic moment of 0. Therefore, this statement is **correct**.

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