CREATE TABLE table_name_40 (commissioned VARCHAR, launched VARCHAR, pennant_number VARCHAR)

Which commission was launched 28 june 1934, and has a Pennant number of h.78?
SELECT commissioned FROM table_name_40 WHERE launched = "28 june 1934" AND pennant_number = "h.78"
SELECT "commissioned" FROM "table_name_40" WHERE "28 june 1934" = "launched" AND "h.78" = "pennant_number"