Today cleared my PSPO I, I must it is not that easy and needs lots of attention to details and reason not to select any option.
Please do not consider it as an exam, rather an opportunity to enrich yourself with Scrum knowledge.
Three 3 things:
1. I Got every word of Scrum guide though it is not enough to clear the exam but makes your fundamentals clear and yu can count it as any time reference for Scrum.