Step 1: Understanding the Concept:
Seed dormancy is a state that prevents viable seeds from germinating even when environmental conditions are favorable. Physiological dormancy is divided into non-deep, intermediate, and deep types.
Step 2: Detailed Explanation:
Statement (I) is true because non-deep physiological dormancy is indeed the most common form of primary dormancy found in seeds of gymnosperms and angiosperms.
Statement (II) is true because seeds with non-deep dormancy can be released from dormancy by short periods of chilling (moist stratification), light, or darkness.
Thus, both statements are correct.
Step 3: Final Answer:
Hence, the correct option is (A).