Q. Which of the following statements about Platyhelminthes is/are correct?

1. The body is bilaterally symmetrical.
2. There is a true internal body cavity or coelom.
3. They are either free-living or parasitic.

Select the correct option from the codes given below:
Answer: Only 1 & 3
Notes: Platyhelminthes are bilaterally symmetrical and show triploblastic organization. They lack a true internal body cavity, i.e., there is no coelom. Members may be free-living (like planarians) or parasitic (like liverflukes). Therefore, statements 1 and 3 are correct, while statement 2 is incorrect as there is no true coelom present.