Ectodermal derivatives include the -

Help link: Ectoderm is the outer germ layer of the embryo and gives rise to:

• Skin and its appendages (hair, nails, sweat glands, sebaceous glands)
• Nervous system

• Melanocytes (pigment-producing cells in the skin)

  Why other options are incorrect:

• Parotid gland → Mainly of ectodermal origin for ducts, but the secretory part is partly from endoderm; generally not listed as classic ectodermal derivative
• Facial skeleton → Derived from mesoderm neural crest (mesenchyme).
• Lining epithelium of blood vessels → Derived from mesoderm