CREATE TABLE table_203_195 (id DECIMAL, "pump type and source" TEXT, "typical use" TEXT, "35 \\u00b0c\ ( e.g. heated screed floor ) " DECIMAL, "45 \\u00b0c\ ( e.g. heated screed floor ) " DECIMAL, "55 \\u00b0c\ ( e.g. heated timber floor ) " DECIMAL, "65 \\u00b0c\ ( e.g. radiator or dhw ) " DECIMAL, "75 \\u00b0c\ ( e.g. radiator and dhw ) " DECIMAL, "85 \\u00b0c\ ( e.g. radiator and dhw ) " DECIMAL)

which pump had the top cop variation at 35 degrees celsius ?
SELECT "pump type and source" FROM table_203_195 ORDER BY "35 \u00b0c\n(e.g. heated screed floor)" DESC LIMIT 1
SELECT "pump type and source" FROM "table_203_195" ORDER BY "35 \u00b0c\n(e.g. heated screed floor)" DESC NULLS LAST LIMIT 1