Final answer:
The type of correspondence for personal matters such as notes to friends or letters about personal business interests is classified as Personal (Option B).
Step-by-step explanation:
Type of Correspondence for Personal Matters
The type of correspondence that pertains to the physician's personal rather than professional life, such as notes to friends or letters about the physician's personal business interests, is B. Personal. This is distinct from business writing, which typically involves formal communication regarding professional matters. Business writing should be clear, concise, and direct, and it's used for a range of purposes including business letters to companies or politicians, cover letters for job applications, or statements of purpose. On the other hand, personal correspondence refers to communications that are not related to one's professional role or job responsibilities and may include messages to friends, family, or personal business dealings.