Five boys — Vivek, Abhishek, Roy, Das, and Ranjan — are compared for height and weight.
- Vivek is taller and lighter than Abhishek.
- Ranjan is shorter and heavier than Das.
- Both Abhishek and Roy are taller and heavier than Das.
- If Abhishek is taller than Roy, then Vivek is heavier than Ranjan.
- Roy is heavier than Abhishek.
If Roy is heavier than Das, then Abhishek is taller than Roy. Who is the lightest?