What does the following code do?

#include<stdio.h>
#include<stdlib.h>
struct Node
{
     int val;
     struct Node* next;
}*head;
int linear_search(int value)
{
      struct Node *temp = head->next;
      while(temp != 0)
      {
           if(temp->val == value)
              return 1;
           temp = temp->next;
      }
      return 0;
}
int main()
{
      int arr[5] = {1,2,3,4,5};
      int n = 5,i;
      head = (struct Node*)malloc(sizeof(struct Node));
      head->next = 0;
      struct Node *temp;
      temp = head;
      for(i=0; i<n; i++)
      {
           struct Node *newNode = (struct Node*)malloc(sizeof(struct Node));
           newNode->next = 0;
           newNode->val = arr[i];
           temp->next = newNode;
           temp = temp->next;
      }
      int ans = linear_search(60);
      if(ans == 1)
      printf("Found");
      else
      printf("Not found");
      return 0;
}

A. Finds the index of the first occurrence of a number in a linked list

B. Finds the index of the last occurrence of a number in a linked list

C. Checks if a number is present in a linked list

D. Checks whether the given list is sorted or not

Answer: Option C