Which Self-Reactive type describes a substance that detonates partially but does not deflagrate rapidly and shows no violent effects under heated confinement; or does not detonate or deflagrate and shows medium effects when under heated confinement?

• A. Type D Self-Reactive
• B. Type C Self-Reactive
• C. Type B Self-Reactive
• D. Self-reactive substance

Answer: (A)

Self-reactive substances are classified by how they react when heated under confinement, specifically whether they detonate, deflagrate, or show other effects and how violent those effects are. Type D covers materials that, under heated confinement, may only partially detonate without rapid deflagration and show no violent effects, or may not detonate or deflagrate at all and exhibit only medium effects. This description matches the given scenario, making Type D the correct category. The other types describe more severe or different patterns of reactivity under heat and confinement.