National Service after PR status

[Bobby1]

Im very much in doubt, and the call centre is always telling to hold the line.

I have got my pr status for about 6 months, I'm of the first generation PR and my PR status is valid for 3 years, currently im pursuing a diploma in a polytechnic.

I was thinking if i deffered NS, it'll be three years later and that is when my status is considered expired. Do i still need to serve NS?

Im hoping to pursue further studies overseas. If i give up my status, can i come back to renounce it under the skilled workers scheme?