To answer this question, we need to have some knowledge of the famous address, 221b Baker Street, which is associated with the fictional detective Sherlock Holmes.
Option A) Mrs Smith - This option is incorrect. Mrs Smith is not the name of the landlady of 221b Baker Street.
Option B) Mrs Hudson - This option is correct. Mrs Hudson is the name of the landlady of 221b Baker Street. She is a recurring character in the Sherlock Holmes stories and is known for her kind and motherly nature towards Sherlock Holmes and Dr. John Watson.
Option C) Mrs Jones - This option is incorrect. Mrs Jones is not the name of the landlady of 221b Baker Street.
Option D) Mrs Bridges - This option is incorrect. Mrs Bridges is not the name of the landlady of 221b Baker Street.
The correct answer is B) Mrs Hudson. This option is correct because Mrs Hudson is the name of the landlady of 221b Baker Street.