Which of the following statements relating to Mao's theory of contradictions are true?
1. Contradictions are universal in all times and in all societies.
2. Antagonistic contradictions exist among the hostile classes in terms of ownership of productive forces.
3. Non-antagonistic contradictions could exist among people which could be resolved without resorting to violence.
4. Contradictions have no place in a socialist system.
Choose the correct answer from the below:

A. 2 and 1

B. 2 and 4

C. 1, 2 and 3

D. 1, 2, 3 and 4

Answer: Option C