Which of the following statements are true regarding [Ondansetron (Zofran, Zuplenz film), Granisetron (Sancuso), Palonosetron (Aloxi)]?
a) They are all first-generation 5-HT3 receptor antagonists
b) Palonosetron has the longest half-life among them
c) Granisetron is available in a transdermal patch (Sancuso)
d) Ondansetron is only available in oral form