Assertion- Schelerenchyma tissues consists of dead cells
Reason- Schelerenchyma tissue provides strength.

Dear student,
Please find below the answer:

Both assertion and reason are true.

Sclerenchyma is the tissue that provides strength and support to primary structures of the plant such as young shoots and leaves. It consists of elongated cells with unevenly thickened walls, they also make up the hard outer covering of seeds and nuts. Sclerenchyma cells are dead at maturity.

Hope this clears your doubt.
Regards.