CREATE TABLE table_68636 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

What was marlboro brm's lowest points by using brm p160b?
SELECT MIN("Points") FROM table_68636 WHERE "Entrant" = 'marlboro brm' AND "Chassis" = 'brm p160b'
SELECT MIN("Points") FROM "table_68636" WHERE "Chassis" = 'brm p160b' AND "Entrant" = 'marlboro brm'