Match Column-I with Column-II and select the correct option using the codes given below:

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1. Mons pubis (A) is a cushion of fatty tissue covered by skin and pubic hair, part of the female external genitalia (iii) .
2. Antrum (B) is the fluid-filled cavity characteristic of the Graafian follicle (iv) (or tertiary follicle) .
3. Trophectoderm (C) (or trophoblast) is the outer layer of the blastocyst that attaches to the endometrium during Implantation (i). Note: The inner cell mass differentiates into the embryo .
4. Nebenkern (D) refers to the spirally arranged mitochondria in the middle piece of the Sperm (ii), which produce energy for motility .

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