Which one of the following is inappropriate about a Tree Data Structure? O a. It is a Non-Linear Data Structure O b. A node must be of Integer type c. Every data item in a tree is known as node. O d. It can be used to represent hierarchical data What differentiates a circular linked list from a normal linked list? a. You may or may not have the next' pointer point to null in a circular linked list O b. It is faster to traverse the circular linked list O c. You cannot have the next pointer point to null in a circular linked list Od. Head node is known in circular linked list Select a statement that holds false for a Binary Search Tree. a. If there exists a left child or left subtree then its value is less than the value of the root. O b. The value(s) in the right child or right sub tree is larger than the value of the root node. O c. Root value is always greater than left and right child. O d. All the node values in a binary search tree must be unique