The correct option is A Epithelial tissue
Germinal epithelium is the epithelial layer covering the genital ridge from which the gonads are derived in early embryonic development. It has the peritoneal epithelium consisting of the cuboidal layer of epithelial cells covering the gonads. So, gametes are derived from the epithelial tissue.
Thus, the correct answer is the option (A), 'Epithelial tissue'.