Step 1: Understanding the Concept:
Seeds are classified as albuminous (endospermic) or non-albuminous (exalbuminous) based on whether they retain endosperm at maturity.
Step 2: Detailed Explanation:
1. Albuminous seeds retain a portion of the endosperm, which serves as a food reserve for the embryo during germination (e.g., Castor, Coconut, Sunflower, Tomato, and Papaya).
2. Non-albuminous seeds completely consume the endosperm during embryo development, storing food reserves instead in the cotyledons (e.g., Pea, Groundnut, Mustard, Cucumber, and Tamarind).
Evaluating the options:
Group (A) includes Castor and Coconut, which are classic endospermic seeds.
Group (C) includes Sunflower, Tomato, and Papaya, which are also endospermic.
Groups (B) and (D) consist of non-albuminous seeds.
Thus, the albuminous seeds are represented in groups (A) and (C).
Step 3: Final Answer:
The correct option is (A) and (C) only.