The correct option is C Inner cell mass
The blastocyst i.e., 32 celled stage, differentiates into an outer trophoblast and inner cell mass. The trophoblast helps in the implantation of the embryo in the uterus. The inner cell mass develops into the body of the embryo. Trophoblast may differentiate into trophectoderm and trophoendoderm. So the correct answer is B.