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Option 1: Lok Sabha - The Lok Sabha is presided over by the Speaker, who is an elected member of the Lok Sabha. Therefore, this option is incorrect.
Option 2: Rajya Sabha - The Rajya Sabha is presided over by the Vice President of India, who is not a member of the Rajya Sabha. This is the correct answer.
Option 3: Both Lok Sabha and Rajya Sabha - As explained above, the Lok Sabha is presided over by the Speaker, who is a member of the Lok Sabha. Therefore, this option is incorrect.
Option 4: Vidhan Sabhas of various states - The presiding officer in the Vidhan Sabhas of various states is either the Speaker or the Deputy Speaker, both of whom are members of the respective Vidhan Sabha. Therefore, this option is incorrect.
In conclusion, the correct answer is option 2: Rajya Sabha, which is presided over by a non-member, i.e., the Vice President of India.