Which of the following Rig-Vedic Gods is not mentioned in 'Boghazkoi' inscription?

Which one of the following is not related to the Rigvedic period?

Which one of the following statements about Rig Vedic goddesses is correct ?

Which of the following rivers mentioned in the Rig Veda indicates the relations of Aryans with Afghanistan?

The compilation of which among the following is based upon the Rig Veda?

Which of the following Gods is referred to as 'Ritasya Gopa' in the Rigveda?