Question:
Match the following items of Column-I with that of Column-II:
Column-I: (a) Trophoblast, (b) Implantation, (c) Inner cell mass, (d) Morula.
Column-II: (i) Embedding of blastocyst in the endometrium, (ii) Group of cells that would differentiate as embryo, (iii) Embryo with $8-16$ blastomeres, (iv) Outer layer of blastocyst.
Choose the option that matches Column-I with Column-II correctly.