1. Understand the statements about a black body

A black body is an ideal body that:

• absorbs all incident radiation,
• emits radiation depending only on its temperature,
• shows a characteristic distribution of intensity with frequency.

We check each statement.

2. Check statement (A)

(A) Emit or absorb energy in the form of electromagnetic radiation.

This is true. A black body both absorbs and emits energy as electromagnetic radiation.

3. Check statement (B)

(B) Frequency distribution of the emitted radiation depends on temperature.

This is true. The spectral distribution of black body radiation changes with temperature, as given by Planck's law.

4. Check statement (C)

(C) At a given temperature, intensity vs frequency curve passes through a maximum value.

This is true. For a fixed temperature, the black body spectrum is not monotonic; it rises, reaches a peak, and then falls. So the curve has a maximum.

5. Check statement (D)

(D) The maximum of the intensity vs frequency curve is at a higher frequency at higher temperature compared to that at lower temperature.

This is true. By Wien's displacement law, as temperature increases, the peak shifts toward higher frequency (or lower wavelength).

6. Count incorrect statements

All four statements are correct.

Therefore, the number of incorrect statements is

$0$

7. Comparison with stored correct answer

Stored correct answer = $0$

Derived answer = $0$

They match.