The name Rh blood group is derived from
a)	Chimpanzee	b)	Monkey	c)	Man	d)	Primitive man

(b)

Another antigen, the Rh antigen similar to the one present in Rhesus monkey (Hence, Rh), is also observed on the surface of RBCs of majority (nearly 80%) of humans. Such individuals are called Rh positive ( ) and those in whom this antigen is absent are called Rh negative ( )