I had considered A, however his organizational flair detailed in the later chapters of the book had me think PA or NP more likely. The repetitive, patterned nature of Beria's crimes and machinations also seemed to lend credence to his being a P trait carrier.

The first and fourth photos in this article show Beria wearing patterned, symmetric shirts: https://www.rbth.com/history/330633-lavrentiy-beria-stalin