Explanation: Search Key is 55. If Search key < element in sequence then we will consider left subtree and following elements in sequence must be smaller than that element and if search key > element in sequence then we will consider right subtree and following elements must be greater than left subtree. We will iterate till last element in sequence (i.e. till search key is found).
For Example : search 55 and sequence is {10, 75, 64, 43, 60, 57, 55}. 55 > 10 then all elements in sequence following 10 are greater than 10. if yes continue if no then that cannot be sequence of node to be examined and break the loop. Continue loop till last element ie 55. Hope explanation makes sense and understandable. Hence C is correct ans.