A pry. teacher had joined on 01.06.1957. His date of Birth on 31.03.1939. In his service Book it is found that the teacher had continuous service upto 31.07.1968. After then no whereabouts had been found upto his normal retirement on 31.03.1999. But the teacher had died on 06.06.2001. How his pension case can be proceeded that’s my question?