Bachelor or Married again

Sardar’s Friend: Yaar,
Last Year The Name Plate Outside Your House
Read Santa Singh, B.A.
This Year It Reads Santa Singh, M.A.
When Did You Finish Your Masters Degree?
Sardar: You Don’t Understand.
Last Year My Wife Died,
I Put B.A. To Indicate “Bachelor Again”.
Then I Took A Second Wife, So M.A. Is “Married Again”.