• Light Sensitivity of Dormancy: Many seeds exhibit photoblastic dormancy (e.g., Lactuca sativa lettuce seeds), where dormancy breaking is strictly regulated by red/far-red light via the phytochrome system ($P_r \rightleftharpoons P_{fr}$). Therefore, stating that dormancy is "not light sensitive" is factually incorrect.
• Other Established Dormancy Causes: Impermeable hard seed coats, physiologically immature embryos, and the requirement for cold stratification are all standard forms of primary seed dormancy.

Correct option: (1) Dormancy is not a light sensitive