All the above formations are incorrect for it to be a redblack tree. then what may be the correct order?

50-red root, 18-red left subtree, 100-red right subtree

50-black root, 18-red left subtree, 100-red right subtree

50-black root, 18-black left subtree, 100-red right subtree

50-black root, 18-red left subtree, 100-black right subtree

All the above formations are incorrect for it to be a redblack tree. t

1.	All the above formations are incorrect for it to be a redblack tree. then what may be the correct order?
A.	50-black root, 18-red left subtree, 100-red right subtree
B.	50-red root, 18-red left subtree, 100-red right subtree
C.	50-black root, 18-black left subtree, 100-red right subtree
D.	50-black root, 18-red left subtree, 100-black right subtree
Answer» B. 50-red root, 18-red left subtree, 100-red right subtree