CREATE TABLE table_53086 ("Pennant number" CLOB, "Ship" CLOB, "Builder" CLOB, "Laid down" CLOB, "Launched" CLOB, "Commissioned" CLOB)

Who is the builder of Pennant d03?
SELECT "Builder" FROM table_53086 WHERE "Pennant number" = 'd03'
SELECT "Builder" FROM "table_53086" WHERE "Pennant number" = 'd03'