In a class of five students $\text{P, Q, R, S}$ and $\text{T}$, only one student is known to have copied in the exam. The disciplinary committee has investigated the situation and recorded the statements from the students as given below.
Statement of $\mathbf{P}: $\text{R}$ has copied in the exam.
Statement of $\mathbf{Q}: \mathrm{S}$ has copied in the exam.
Statement of $\mathbf{R}: $\text{P}$ did not copy in the exam.
Statement of $\mathbf{S}$: Only one of us is telling the truth.
Statement of $\mathbf{T}$: $\mathrm{R}$ is telling the truth.
The investigating team had authentic information that S never lies.
Based on the information given above, the person who has copied in the exam is
- $\mathrm{R}$
- $\mathrm{P}$
- $\mathrm{Q}$
- $\mathrm{T}$
