Are the Vedas true

Yes, Vedas are true.

The Vedas (Sanskrit Word for "knowledge") are a large body of texts originating in ancient India. Composed in Vedic Sanskrit, the texts constitute the oldest layer of Sanskrit literature and the oldest scriptures of Hinduism.

The Vedas are apauruṣeya ("not of human agency"). They are supposed to have been directly revealed, and thus are called śruti ("what is heard"), distinguishing them from other religious texts, which are called smṛti ("what is remembered").

The Bhagavata Purana (12.6.37) traces the origin of the primeval Veda to the syllable aum, and says that it was divided into four at the start of Dvapara Yuga, because men had declined in age, virtue and understanding. In a differing account Bhagavata Purana (9.14.43) attributes the division of the primeval Veda (aum) into three parts to the monarch Pururavas at the beginning of Treta Yuga. The Mahabharata (Santiparva13,088) also mentions the division of the Veda into three in Treta Yuga.