Step 1: Understand what is being asked.
The phrase asks for the term describing medical or health care that specifically deals with elderly people.
Step 2: Recall the medical term.
"Geriatric" relates to old age and the health care of elderly people, as in "geriatric medicine" or "geriatric care". This directly matches the phrase.
Step 3: Eliminate the distractors.
"Bariatric" relates to the treatment of obesity, not old age. "Veteran" refers to someone with long experience, often in the military, not to health care. "Novice" means a beginner. "Turncoat" refers to a person who betrays their group or switches loyalty. None of these connect to elder health care.
Step 4: Confirm the choice.
The correct term is "geriatric", option (c).