Endoderm forms

The correct answer is D. viscera and digestive system.

The endoderm is the innermost layer of the embryo, and it gives rise to the lining of the digestive tract, respiratory tract, bladder, and urethra. It also forms the liver, pancreas, and thyroid gland.

The blood and bone are formed from the mesoderm, while the nervous system is formed from the ectoderm.

Here is a more detailed explanation of

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