Explanation:

1 and 3 only

Administration in Rig Vedic Period
• The administrative machinery of the Aryans in the Rig Vedic period functioned with the tribal chief, for his successful leadership in war, at the centre. He was called Rajan. It seems that in the Rig Vedic period, the king’s post had become hereditary. However, the rajan was a kind of chief and did not exercise unlimited power, having to reckon with the tribal organizations.
• Several tribal or kin-based assemblies such as the sabha, samiti, vidatha, and gana are mentioned in the Rig Veda. They exercised deliberative, military, and religious functions. Even women attended the sabha and vidatha in Rig Vedic times.
• In the day-to-day administration, the king was assisted by a few functionaries. The most important of these seems to have been the purohita.
• Next in rank to the king was the senani or the head of the army. He used spears, axes, swords, etc.
• We do not learn of any officer concerned with the collection of taxes. In all probability, the people made voluntary offerings called bali to the rajan.
• The officer who enjoyed authority over a large stretch of land or pasture ground was called vrajapati. He led to battle the heads of the families called kulapas, or heads of the fighting hordes called gramanis