X is a ketone that is non-cyclic and contains one carbonyl group only, with no other functional groups present. Ketone X shows the following properties: • On reaction with NaBH$_4$, the organic product has an $M_r$ that is 2.3256% greater than the $M_r$ of ketone X. • Ketone X produces a yellow precipitate with alkaline I$_2$(aq). How many isomeric ketones could ketone X be?
- A1
- B2
- C3
- D4