Two statements are given. Statement I: every student standing in the row is taller than Riya. Statement II: Riya is taller than Sameer. Which conclusion definitely follows from the two statements taken together?

Each student in the row is above Riya in height and Riya is above Sameer, so every student in the row is above Sameer. That chain is the only safe conclusion. The traps: nothing says Riya is in the row at all, so she need not be its shortest student; nothing places Sameer in the row either; and the last option directly contradicts the chain just established.