The correct option is C Neck
Taenia solium is the pork tapeworm belonging to cyclophyllid cestodes in the family Taeniidae. The elongated body of Taenia is called the strobila, which is divided into segments called proglottids, 800 to 900 in number. Body growth starts from the neck region, so the oldest proglottids are at the posterior end and new proglottids in the body of Taenia are towards the neck. So, the correct answer is option C.