Home » Which of the following is a water-soluble vitamin and hence is required to be taken everyday? Nutrition MCQs Which of the following is a water-soluble vitamin and hence is required to be taken everyday? May 5, 2022 3 Views Q. Which of the following is a water-soluble vitamin and hence is required to be taken everyday? A. Vitamin D B. Vitamin C C. Vitamin K D. Vitamin A Answer: Vitamin C