Hello! I'm not sure if this is the best place to post this question so please let me know if I am in the wrong place. I am preparing for my Platform Developer I exam and I am a bit confused. At this Trailhead site, https://trailhead.salesforce.com/credentials/platformdeveloperi, at the bottom of the page there is a DEX-450 and a CRT-450. I am focusing on the CRT-450, is that correct for the Platform Developer I? I only ask because when I look at the Kryterion webassessor page to schedule the exam, I get an option for Salesforce Platform Developer I (SP20) but I can't seem to find a reference to SP20 on the Trailhead site. Anyhow, any help would be greatly appreciated. I'm just trying to make sure I prepare and then take the correct exam for Platform Developer I.

Thank you!!!