Who among the following was not a contemporary of the other three?

Bimbisara and Prasenajit (Pasenadi of Kosala) were contemporaries and rivals in the age of the early Mahajanapadas; sources record Bimbisara’s relations and conflicts with Prasenajit and his patronage of the Buddha, indicating they lived in the same period [1]. The Buddha is likewise recorded as living and teaching during Bimbisara’s reign, making him contemporary with both kings [1]. Milinda (Menander I), known from the Milinda Panha as the Indo-Greek king who debated the monk Nagasena, belongs to a much later Indo-Greek period and is not a contemporary of the 6th–5th century BCE Magadhan-Kosalan rulers; thus Milinda is the odd one out [2].

Sources

1. [1] History , class XI (Tamilnadu state board 2024 ed.) > Chapter 4: Emergence of State and Empire > 4.1 Rise of Magadha under the Haryanka Dynasty > p. 48
2. [2] History , class XI (Tamilnadu state board 2024 ed.) > Chapter 3: Rise of Territorial Kingdoms and New Religious Sects > The Starving Tigress: A Jataka Tale > p. 43