Final answer:
In the original 'Human Centipede' film, a surgeon connects three people to form a 'human centipede'. The correct answer is a) 3.
Step-by-step explanation:
The original Human Centipede film, which is a piece of horror cinema, linked three people together. The film's plot involves a deranged surgeon who kidnaps three tourists and surgically connects them mouth to rectum, creating the 'human centipede' as part of a twisted medical experiment. Therefore, the correct answer to the question is a) 3.