May I remove without any risk the two recovery partitions in win 8.1 Pro 64bit and what is the hidden reserved partition?

I have this partition situation on my unic disc C & D for Windows 8.1 Pro at 64bits (see fig. 1)

and this is the same list from diskpart:

My first question is: may I remove partitions 1 and 5 without any risk?

My second question is what is the reserved partition 3 and why is not mentioned in Disc Manager?

Thanks for your help and excuse if the images are in Italian but I'am using an Italian OS.

Rinog47

rinog47