explain in detail

Dear student,
Please find below the answer:

The correct option is (2).

Tendrils are threadlike structures and are modified stems or leaves. The tendrils intertwine around whatever it touches. In this way, it helps the plants with weak stems to climb.

Grapevine (apical bud tendrils), Passiflora (axillary tendrils), and bottle gourd possess tendril as stem modification. Pe has leaves modified into tendrils and not stem.

Hope this clears your doubt.
Regards.