The correct answers are a, b, and d.
The kind of decoration which were used on tutankhamun's collar were;
A. Gold with coloured glass.
B. Shaped like vulture.
D.Taking grasping a shen with sun disk.
Tutankhamen's mask was a mask which was used to cover the face of pharaoh's mummy such that his spirit being in ability to recognize the body.
Tutankhamen's mask is very fragile and that it does not need any movement it is kept in Egypt.
Theban necropolis which is in valley of kings is where burial chamber of tutankhamun's found.