Effective teaching of social science would require: A. Perpetuating all cultural practices of the past. B. Critical analysis of literary texts, howsoever old they may be. C. Discarding all sources which are non-textual. D. Giving primacy to triangulation of sources. Choose the correct option.

Effective social science teaching requires critical analysis of all texts (B) and triangulation of multiple sources to ensure validity (D). Perpetuating all past cultural practices (A) is uncritical and can promote regressive ideas. Discarding non-textual sources (C) would ignore valuable evidence like artifacts, oral histories, and visual sources. Hence, B and D together represent effective social science pedagogy, making option (3) correct.