Explanation:

- According to Touraine (1968), social movements have three key functions:

1. Mediation: This involves facilitating dialogue between different social groups or between the public and authorities.

2. Pressure: Social movements exert pressure on political systems or entities to bring about change or influence policy.

3. Clarification of Collective Consciousness: They help in defining and articulating the values and beliefs of a community or group, making collective aspirations clear.

- Option 1 (1, 2, 3): Lists all three of the functions stated by Touraine.

- Option 2 (2, 1, 2): Incorrect listing of functions, with repetition.

- Option 3 (3, 1, 2, 3, 4): Includes an extra function not stated by Touraine.

- Option 4 (1, 2, 3): Correctly lists the three functions as per Touraine's framework.

Option 4 (1, 2, 3) is correct.