Q--Did pirates who had scurvy need more Vitamin C?
A--My step-by-step reasoning: Pirates were known for having poor teeth and deteriorated gums. Gum deterioration and tooth decay is a symptom of scurvy. Scurvy is caused by a lack of dietary vitamin C.
So, the answer is yes.

Q--Is it impossible to tell if someone is having a stroke?
A--My step-by-step reasoning: Strokes have numerous physical symptoms including facial unevenness and trouble walking. Strokes have behavioral symptoms including slurred speech, disorientation, and trouble understanding speech.
So, the answer is no.

Q--Do drag kings take testosterone to look masculine?
A--My step-by-step reasoning: Drag Kings will use contouring and makeup to make their facial features appear more masculine and chiseled. Testosterone is prescribed for transgender men to help with transitioning and dysphoria. Drag kings often identify as women, but dress as men for show.
So, the answer is no.

Q--Does the Roman god Vulcan have a Greek equivalent?
A--

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
My step-by-step reasoning: Vulcan is the Roman god of fire and metalworking. Hephaestus is the Greek god of fire and metalworking. They are the same mythological figure, one of many characters the Romans borrowed from the Greeks and changed their names.
So, the answer is yes.