The correct answer is A. Tripitakas.
The Tripitakas are the sacred texts of Buddhism. They are divided into three parts: the Vinaya Pitaka, the Sutta Pitaka, and the Abhidhamma Pitaka. The Vinaya Pitaka contains the rules of monastic discipline. The Sutta Pitaka contains the Buddha’s discourses. The Abhidhamma Pitaka contains a systematic exposition of Buddhist doctrine.
The Upanishads are a collection of Hindu scriptures that form part of the Vedas. They are concerned with philosophical and spiritual matters, such as the nature of reality, the soul, and liberation.
The Angas are a collection of texts that form part of the Jain canon. They deal with a variety of topics, including cosmology, ethics, and ritual.
The Aranyakas are a collection of texts that form part of the Hindu Vedas. They are concerned with ritual and philosophy.
The Tripitakas are the most important Buddhist texts. They contain the teachings of the Buddha, which are the foundation of Buddhism. The Upanishads, Angas, and Aranyakas are also important texts, but they are not as central to Buddhism as the Tripitakas.