SELECT "Category 3" FROM table_49937 WHERE "Category 1" = '0.05'
If category 1 is 0.05, what is category 3?
CREATE TABLE table_49937 (
    "Method of administration[ citation needed ]" text,
    "Category 1" real,
    "Category 2" real,
    "Category 3" text,
    "Category 4" text,
    "Category 5" text
)