Identify the option that correctly pairs the site of an Ashokan pillar with its corresponding Indian state.

The correct answer is Vaishali – Bihar.

Let us analyze the pairs to determine the correct pairing of the Ashokan pillar site with its corresponding Indian state:

1. Vaishali – Bihar: The Ashokan pillar at Kolhua, Vaishali, is famous for its single lion capital facing north. Vaishali is located in the state of Bihar. Therefore, this pair is correctly matched.

2. Amaravati – Andhra Pradesh: Amaravati is a historic site associated with Buddhist monuments, famous for its Stupa, and is situated in Andhra Pradesh (not Karnataka).

3. Rampurva – Bihar: Rampurva is an important Ashokan pillar site located in the West Champaran district of Bihar (not Uttar Pradesh).

4. Dhauli – Odisha: Dhauli is famous for the Major Rock Edicts of Ashoka and the rock-cut elephant structure, located near Bhubaneswar in Odisha (not Rajasthan).

Hence, the correctly paired option is Vaishali – Bihar.