Table:
text: List of best-selling music artists
250 million or more records
250 million or more records
Artist Country_of_origin Period_active Release_year_of_first_charted_record Genre Claimed_sales
The Beatles United Kingdom 1960–1970 1962 Rock / Pop 600 million
Elvis Presley United States 1954–1977 1954 Rock and roll / Pop / Country 600 million 500 million
Michael Jackson [Note 2 ] United States 1964–2009 1971 Pop / Rock / Dance / R&B 400 million 350 million 300 million
Madonna United States 1979–present 1982 Pop / Rock / Dance 300 million 275 million
Elton John United Kingdom 1964–present 1969 Pop / Rock 300 million 250 million
Led Zeppelin United Kingdom 1968–1980 1969 Hard rock / Heavy metal 300 million 200 million
Pink Floyd United Kingdom 1965–1996 1967 Progressive rock 250 million 200 million

Question: What is the genre for Led Zeppelin among 250 million or more top selling music artists?