Hi there. Please get other opinions BUT it looks as though the first 2 plants are female, the 3rd is definitely MALE so get rid of it as carefully and quickly as you can. It may be too late as it looks like those little balls have opened up. It doesn't mean you won't get any good weed BUT it does mean that it will have seeds. The 4th one looks as though it could be female BUT it also looks a bit premature to tell. This one looks like it was the last the start growing.
I have no doubt that others will contribute more info that will be useful.
if these are all different plants then
picture 1 is female
2 is unclear, picture blurry
3 very male and probably already dropping pollen, get rid of it
4, also too blurry