The residual, persistent nucellus in the seeds is termed as

The correct answer is Option (1) → Perisperm

Option (1) Perisperm — Correct. In some seeds a part of the nucellus is not used up and remains. This residual, persistent nucellus is called the perisperm, as in black pepper and beet.

Note: A similar question was also asked in CUET (UG) 2023 on 22-06-2023 (Slot 3).

NCERT Extract:
Seed – “… Mature seeds may be non-albuminous or ex-albuminous. Nonalbuminous seeds have no residual endosperm as it is completely consumed during embryo development (e.g., pea, groundnut). Albuminous seeds retain a part of endosperm as it is not completely used up during embryo development (e.g., wheat, maize, barley, castor). Occasionally, in some seeds such as black pepper and beet, remnants of nucellus are also persistent. This residual, persistent nucellus is the perisperm.”