how many types of Blood groups are there

India
November 25, 2006 1:57pm CST
A, AB, B, O, any more
4 responses
@zubair439 (3188)
• India
25 Nov 06
i also know these four ,not more than that...these four have + and -
1 person likes this
• India
25 Nov 06
yeah + & - are Rh group
@annihilus (2185)
• Italy
25 Nov 06
are you a vampyre?
• India
26 Nov 06
what do you mean
@mayammb (1818)
• Australia
25 Nov 06
Only 4 types + and -
@khysnews (743)
• Indonesia
25 Nov 06
much, i'm A