Step 1: Concept.
Vitamins are classified into water-soluble and fat-soluble categories. Water-soluble vitamins include Vitamin B-complex and Vitamin C. Fat-soluble vitamins are A, D, E, and K.
Step 2: Analysis of options.
(A) A and B: Incorrect, Vitamin A is fat-soluble.
(B) C and D: Incorrect, Vitamin D is fat-soluble.
(C) B and C: Correct, both are water-soluble.
(D) A and D: Incorrect, both A and D are fat-soluble.
Step 3: Conclusion.
Thus, the correct answer is (C) B and C.