Consider the following statements:
For a 10 m long common power line connecting a switch to a light bulb
1. It is distributed circuit
2. Time delay for propagation through it is negligible
3. It is in the form of a shielded coaxial cable of circular cross-section
4. As the intensity of the lamp varies, input impedance of this line also changes
Which of the above statements is/are correct?

A. 1 only

B. 1 and 2

C. 2 and 3

D. 2 and 4

Answer: Option D