In Śaiva-siddhānta, the key entities are:
1. Pati (Śiva or God): The divine entity.
2. Paśu (bound individual self or soul): The individual self, bound by ignorance and karma.
3. Pāśa (bonds or bondage): The factors that bind the soul, such as ignorance, karma, and impurities.
These three form the core cosmology and soteriology of Śaiva-siddhānta. Prāņa (life principle) is not a chief entity in this context. Thus, the correct answer is (B, C, D).