The table gives the nucleon number and the proton number for different nuclei. The nuclei are labelled $L$ to $T$. Which row in the table below shows correctly three nuclei of the same element, and three nuclei with the same number of neutrons?
- Asame element: $L\,M\,N$; same number of neutrons: $R\,P\,N$
- Bsame element: $M\,P\,S$; same number of neutrons: $R\,S\,T$
- Csame element: $O\,P\,Q$; same number of neutrons: $M\,P\,S$
- Dsame element: $R\,P\,N$; same number of neutrons: $O\,P\,Q$