An organic chemist synthesised a sample of a pharmaceutical compound with a literature melting point of 155∘C155^\circ\text{C}155∘C. To assess the purity of the sample, they recorded its melting point range and performed thin-layer chromatography (TLC).
Which row in the table below correctly describes the properties of a chemically pure sample of this compound?
RowMelting Point Range (∘C)Number of Spots on ChromatogramA145−1522B150−1551C155 (sharp)1D155 (sharp)3 \begin{array}{|c|c|c|}\hline \textbf{Row} & \textbf{Melting Point Range } (^\circ\text{C}) & \textbf{Number of Spots on Chromatogram} \\ \hline \textbf{A} & 145 - 152 & 2 \\ \hline \textbf{B} & 150 - 155 & 1 \\ \hline \textbf{C} & 155 \text{ (sharp)} & 1 \\ \hline \textbf{D} & 155 \text{ (sharp)} & 3 \\ \hline \end{array} RowABCDMelting Point Range (∘C)145−152150−155155 (sharp)155 (sharp)Number of Spots on Chromatogram2113Row A\text{Row A}Row A
Row B\text{Row B}Row B
Row C\text{Row C}Row C
Row D\text{Row D}Row D