Differentiate between 'Product Concept' and 'Societal Marketing Concept' of marketing management philosophies on the basis of :
(a) Meaning
(b) Main focus
(c) Means
(d) Ends
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For marketing concepts, remember "PPS" - Production, Product, Selling (old concepts) vs "MSS" - Marketing, Societal, Sustainable (modern concepts). Always give contrasting examples.