National and Regional Contests USA Contests USA Physics and Chemistry Contests National Chemistry Olympiad 2013 National Chemistry Olympiad 60 2013 USNCO Problem 60: Most soluable vitamin Problem Statement Which vitamin is the most soluble in water?< s p a n c l a s s = ′ l a t e x − b o l d ′ > ( A ) < / s p a n > A < s p a n c l a s s = ′ l a t e x − b o l d ′ > ( B ) < / s p a n > K < s p a n c l a s s = ′ l a t e x − b o l d ′ > ( C ) < / s p a n > C < s p a n c l a s s = ′ l a t e x − b o l d ′ > ( D ) < / s p a n > D { <span class='latex-bold'>(A)</span>\ \text{A} \qquad<span class='latex-bold'>(B)</span>\ \text{K} \qquad<span class='latex-bold'>(C)</span>\ \text{C} \qquad<span class='latex-bold'>(D)</span>}\ \text{D} \qquad < s p an c l a ss = ′ l a t e x − b o l d ′ > ( A ) < / s p an > A < s p an c l a ss = ′ l a t e x − b o l d ′ > ( B ) < / s p an > K < s p an c l a ss = ′ l a t e x − b o l d ′ > ( C ) < / s p an > C < s p an c l a ss = ′ l a t e x − b o l d ′ > ( D ) < / s p an > D