In ELISA, which of the following enzymes are conjugated to antibodies for detection of the analyte?
P. Alkaline phosphatase
Q. Trypsinase
R. Horseradish peroxidase
S. Amylase
- $\mathrm{P}$ and $\mathrm{R}$
- $\text{P}$ and $\text{Q}$
- $\text{Q}$ and $\text{S}$
- $\mathrm{R}$ and $\mathrm{S}$