Which of the following spectroscopic technique(s) can be used to identify all the functional groups of an antibiotic contaminant in food?
- Infrared
- Circular dichroism
- Nuclear magnetic resonance
- UV-Visible
- $\text{P}$ only
- $\text{P}$ and $\text{R}$ only
- $\text{P, Q}$ and $\text{R}$ only
- $\text{P, Q, R}$ and $\text{S}$