Which of the following Statement(s) is//are correct?

Options

A. `Transition metals and many of their compounds show paramagnetic behaviour.
B. The enthalpies of atomisation of the transition metals are high
C. The transition metals generally form coloured compounds
D. Transition metals and their many compounds act as good catalyst.

Explanation

To determine which statements regarding transition metals are correct, we will analyze each statement step by step.

### Step 1: Evaluate the first statement
**Statement:** Transition metals and many of their compounds show paramagnetic behavior.

**Analysis:**
- Transition metals have unpaired electrons in their d subshells.
- The presence of one or more unpaired electrons leads to paramagnetism, which means the substance is attracted to a magnetic field.
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