Is this MG deficiency?

Hi,

Have attempted to match my leaves to the diagnosis guides but still not sure. This is 2nd grow and whilst I have read that initial leaves may wilt and die I cannot recall this happening first time round. I have attached a pic so if you do have any info that would help that would be great.

Also, unsure if this is a photo or auto as I am growing both and if I ever needed an excuse not plant whilst high then this was it as they are not sign posted.

Cheers

Doesn't look like Mg deficiency to me, not sure what it is. Good luck with it.