Question

Cells having lignified walls are present in

• A. Tracheary elements
• B. Sieve elements
• C. Sclereids
• D. A and C

Answer 1

The correct option is D A and C

1. Tracheids are part of xylem which is spindle-shaped cells with thick and lignified walls and tapering ends. These are dead without protoplasm.
   
2. Sieve elements are part of phloem which is long tube-like structure and is living with protoplasm without a nucleus.
3. Sclereids are dead and lignified sclerenchyma cells that are present mostly in between fruit pulp.

So the correct option is 'A and C'