Explain simply why the Emperor Ashoka is the correct answer to: Passage: The Lion Capital of Ashoka is a sculpture of four Asiatic lions standing back to back, on an elaborate base that includes other animals. A graphic representation of it was adopted as the official Emblem of India in 1950. It was originally placed atop the Asoka pillar at the important Buddhist site of Sarnath by the Emperor Ashoka, in about 250 BCE. The pillar, sometimes called the Asoka Column, is still in its original location, but the Lion Capital is now in the Sarnath Museum, in the state of Uttar Pradesh, India. Standing 2.15 metres (7 feet) high including the base, it is more elaborate than the other very similar surviving capitals of the pillars of Ashoka bearing the Edicts of Ashoka that were placed throughout India several of which feature single animals at the top; one other damaged group of four lions survives, at Sanchi.

Question: Based on this passage, lion capital of sarnath belongs to which king?. Explanation:
This is the relevant information: It was originally placed atop the Asoka pillar at the important Buddhist site of Sarnath by the Emperor Ashoka, in about 250 BCE.