PSPO and PSD Mandatory for PSM1 ?

Friends is it mandatory to tryout PSPO and PSD open assessment for psm1 preparation ?

I have gone through the guide 3 times, took PSM open assessment multiple times and got 100%

Currently doing online mock exam.
Your valuable inputs will be really helpful.

Also could someone post a tricky question which you faced during your psm1 assessment, it may help me to assess where I stand