Ans. 4

Lord Brahma has four heads. Vedas  are the Vani of Brahma, each Ved came from each mouth of  Brahma. the 4th ved Atharva was discovered later by Rishi Atharv  . At the end of each yuga Brahma undergoes in a state of meditation and from each mouth he preaches  vedas , once in the same state a Danav heard the 4th ved and he took the next birth as Rishi Atharv .


Name of four vedas :


1. RidVeda

2. SamaVeda

3. Yajurveda

4. Atharvaveda

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