Mr Wise come across a group of $4$ people. He finds that some of these $4$ people always tell the truth and some always tell lies. So he asks each of them and gets the following answers:

• $A$: "All of us tell lies."
• $B$: "There is only one among our four who tells lies."
• $C$: "There are two among us who tell lies."
• $D$: "I am telling the truth."

Do you think whether $D$ tells the truth?