A compound with the molecular formula C5H10O2 has the following 1H NMR spectrum: A proton NMR spectrum shows 3 peaks and their integration values. The quintet at 5. 0 ppm has an integration value of 6. 33. The singlet at 2. 0 ppm has an integration value of 19. 4. The doublet at 1. 3 ppm has an integration value of 37. 9. Determine the number of proton(s) giving rise to the signal at 5 ppm. Select answer from the options below .
A. 3
B. 1
C. 6
D. 10