Three students from Forestry University, Liu Wei, Li Gang and Wu Qiang, went to the mountain to plant trees. They planted three trees altogether: a poplar, a pine and a locust tree. It is reported that Liu Wei did not plant poplars, Li Gang did not plant locust trees and Wu Qiang did not plant either poplar trees or locust trees .
Which of the following options is correct according to the above definition?
Liu Wei planted locust trees , Li Gang planted poplar trees and Wu Qiang planted pine trees 