The question hinges on the interpretation of statement (ii). If statement (ii) is accepted as true (i.e., speed limits are not specific for different types of roads), then option A becomes plausible if statement (iii) is considered false or irrelevant for selecting A. However, statement (iii) is factually true and statement (iv) is factually false. This question is poorly constructed. Assuming the provided answer A is correct, it implies that the intended correct statements are (i) and (ii). This means that the question setter believes that speed limits are NOT specific for different types of roads, which is factually incorrect.