Can A negative boy marry AB positive blood girl?

Answer 1

Yes. Blood type does not matter when it comes to marriage or the ability to birth a child. The only thing you could possible worry about it whether or not you could be a donor for your spouse. In the case of an A- groom and an AB+ bride, the groom could donate blood to the bride (given that there aren't any atypical antibodies that would cause an incompatibility between donor and recipient blood), but the bride would not be able to donate blood to the groom.