Option d is the correct answer. The Besanagar inscription of Heliodorus is associated with only Vasudeva. The Indo Greek ruler Anticidas sent his ambassador Heliodorus to the court of Shunga ruler Bhagabhadra. Heliodorus constructed a pillar at Vidisha in honour of Vasudeva (Krishna). The Pillar is also known as Garuda dhwaja or Besanagar Pillar inscription.