In fern plants, the correct statement is option 2 - reproductive organs are multi-cellular.

Let`s break down each statement to understand why option 2 is correct:

Statement 1: vascular system is absent.

This statement is incorrect. Fern plants do possess a vascular system. The vascular system in ferns consists of xylem and phloem that transport water, nutrients, and sugars throughout the plant.

Statement 2: reproductive organs are multi-cellular.

This statement is correct. Fern plants have multi-cellular reproductive organs. The male reproductive organs are called antheridia, which produce sperm, and the female reproductive organs are called archegonia, which produce eggs. The sperm and eggs are fertilized to form zygotes, which eventually develop into new fern plants.

Since statement 1 is incorrect and statement 2 is correct, the correct option is 2 - 2 only.

Alert - correct answer should be option 2 only.