Which of the following statement is true?

Options

A. Some complex metal oxides behave as superconductor
B. Zinc oxide can act as superconductor
C. An impurity of tetravalent germanium in trivalent gallium creates electron deficiency
D. A Frenkel defect is formed when an ion is displaced from its lattice site to an interstitial site

Explanation

To determine which statement is true among the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze Option 1**:
- Statement: "Some complex metal oxides behave as superconductors."
- Explanation: Superconductors are materials that exhibit zero electrical resistance. While it is true that some complex metal oxides can behave as superconductors, they typically do so at very high temperatures. However, the statement is misleading as it does not specify that these are high-temperature superconductors. Therefore, this statement is considered **false**.

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