Q. How do you count the number of elements in the circular linked list?

• (A) public int length(node head) { int length = 0; if( head == null) return 0; node temp = head.getnext(); while(temp != head) { temp = temp.getnext(); length++; } return length; }
• (B) public int length(node head) { int length = 0; if( head == null) return 0; node temp = head.getnext(); while(temp != null) { temp = temp.getnext(); length++; } return length; }
• (C) public int length(node head) { int length = 0; if( head == null) return 0; node temp = head.getnext(); while(temp != head && temp != null) { temp = head.getnext(); length++; } return length; }
• (D) public int length(node head) { int length = 0; if( head == null) return 0; node temp = head.getnext(); while(temp != head && temp == null) { temp = head.getnext(); length++; } return length; }