Which one among the following is not true with regard to Rig Veda Samhita?

• A

  There are about 300 non-Indo-European words in Rig Veda
• B

  There is a reference to dasarajna (battle of ten kings) in the Rig Veda
• C

  It is mentioned in the Rig Veda that the Bharata chief Sudas fought against a confederacy of ten tribes
• Correct answer
  D

  Purus sided with Bharata in the battle of ten kings

Hence, the correct answer is option: 'D'.