To answer this question, we need to understand the history of aspirin and heroin.
Option A) By a hairdresser - This option is incorrect. Aspirin and heroin were not created by a hairdresser.
Option B) By a dentist - This option is incorrect. Aspirin and heroin were not created by a dentist.
Option C) By Thomas Edison - This option is incorrect. Aspirin and heroin were not created by Thomas Edison.
Option D) By the same chemist, only 11 days apart - This option is correct. Both aspirin and heroin were created by the same chemist, Felix Hoffmann, who was working for the pharmaceutical company Bayer. He first synthesized aspirin on August 10, 1897, and then synthesized heroin on August 21, 1897, just 11 days later.
The correct answer is D. Both aspirin and heroin were created by the same chemist, only 11 days apart.