Malini is shorter than Nimal, but she is taller than Ravindran. Sirimalee is shorter than Ravindran. Peter is taller than Ravindran, Peter is taller than Sirimalee, but shorter than Nimal. Ahmed is shorter than Malini. If the statements above are true, and, one need to conclude that Ahmed is taller than Sirimalee, which one of the following must also be true?