Medicine 65-year-old man presents with anemia, posterior columan dysfunction, and planter extensor. Which of the following is the likely cause A Tabes dorsalis B Frederich's ataxia C Vitamin B1 deficiency D Vitamin B 12 deficiency 💡 Explanation 65-year-old man presents with anemia, posterior columan dysfunction, and planter extensor. Which of the following is the likely cause ✓ Correct Answer: D. Vitamin B 12 deficiency