In grass family the cotyledon is called:

Scutellum

The correct answer is Option (2) – Scutellum

Embryos of monocotyledons possess only one cotyledon. In the grass family the cotyledon is called scutellum that is situated towards one side (lateral) of the embryonal axis. The scutellum is a specialized structure found in the embryo of grasses, including wheat. It is a single, large, shield-shaped cotyledon that is responsible for nutrient absorption during germination. It is located between the embryonic axis and the endosperm of the grain. The scutellum plays a vital role in providing nutrients to the developing seedling until it can establish its own photosynthetic capabilities. Therefore, the large, shield-shaped cotyledon in the wheat grain is known as the scutellum.