Which one is the wrong statement?

We analyze each statement:

1. de-Broglie Wavelength: The equation $\lambda = h/mv$ correctly represents the wavelength of a matter wave. This is a correct statement.
2. Uncertainty Principle: Heisenberg's uncertainty principle can be expressed in terms of energy and time as $\Delta E \Delta t \ge \frac{h}{4\pi}$. This is a correct statement.
3. Orbital Stability: As seen in transition elements (Source: Chemistry Class 12, Unit 4, Section 4.3.3), half-filled and fully filled orbitals exhibit extra stability due to high exchange energy and symmetrical distribution of electrons. This is a correct statement.
4. Energy Levels in Hydrogen: For hydrogen-like atoms (single-electron systems), the energy of an orbital depends only on the principal quantum number ($n$). Therefore, the energy of the 2s orbital is equal to the energy of the 2p orbital ($E_{2s} = E_{2p}$). The statement that $2s < 2p$ is true only for multi-electron atoms where shielding effects occur. Thus, this is the wrong statement.