The correct option is A amniotic fluid
The cavity which is formed between the epiblast cells is known as amniotic cavity. The fluid which accumulates within this cavity is called the amniotic fluid. It acts as a shock absorber and protects the foetus in the womb. Seminal fluid is a complex fluid comprising of secretions from all organs or tubules of the seminal tract (bulbourethral glands, seminal vesicles, prostate, vasa deferentia and epididymides) and from the seminiferous tubules in the testicles of males. Its contents are rich in sperm, metabolites such as fructose, calcium, citric acid, etc. Blood will not be present within the amniotic cavity.