Yes, an AB positive and AB negative man and woman can marry. During a pregnancy, she'll receive Rhogam to prevent rh sensitization.
Yes
You can marry anyone, no matter the bloodtype.
Blood type has nothing to do with getting married. You can marry no one asks you your blood type.
no
yes
yes
see a doctor for such questions
yes
see a doctor for such questions
you can marry anyone you want
Yes, but its possible the girl would need shots if she got pregnant.
yes