Totally agree with you, Every state has different and distinct cuisine in south India..Karnataka offers the best breakfast variety i feel apart from the usuals like Dosa and all which are common in the other three states of SI.
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Andhra Pradesh is class apart with one of the most spicy food in India, specially Telangana region with the worldwide famous Hyderabadi Cuisine.
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In north, apart from Punjabi i dont think there is any other cuisine line as famous all over and tasty as Hyderabadi which is definitely south!