In diagram of implanatation of blastocyst, choose correct match

Implantation of blastocyst is the stage when the developing embryo called the blastocyst moves through the uterus and makes contact with the uterine walls. This happens at around 6-7 days after fertilisation. During this stage the cells differentiate into two types of cells, the outer layer of cells called the trophoblast layer (marked A in the diagram) and the group of inner rounded, internally located cells called the inner cell mass cells (marked C). The space or cavity formed by the separation of the two types of cells is known as the blastocyst cavity or blastocoel (marked B). The blastocyst embeds itself in the endometrium of the uterine wall (marked D). So, the correct option is 'A= Trophoblast, B = Blastocyst cavity, C = Inner cell mass, D = Endometrium of uterus'.