Explanation:

Let’s break these down, one by one:

- Refusing to take oath: Under Section 178 of the Indian Penal Code, if someone legally bound to take an oath refuses, the punishment prescribed is *simple imprisonment*.

- Disobedience to an order duly promulgated by a public servant: Section 188 says anyone who disobeys an order by a public servant can be punished, and the punishment is *simple imprisonment* (unless it causes or is likely to cause danger to human life, etc., then it may be rigorous).

- Wrongful restraint: Section 341 covers this and specifically allows only for *simple imprisonment*.

So, to sum up, in all these situations, the law specifies simple imprisonment only.

Correct Answer:

Option 4: All of the above.