If illudin S is warmed under reflux with excess acidified potassium dichromate(VI), compound M is produced. What molecular formula does compound M have?
- A$\text{C}_{15}\text{H}_{16}\text{O}_4$
- B$\text{C}_{15}\text{H}_{16}\text{O}_5$
- C$\text{C}_{15}\text{H}_{18}\text{O}_4$
- D$\text{C}_{15}\text{H}_{18}\text{O}_5$