Prolonged use of nitrous oxide has been shown to produce
1. abortions in females.
2. cancer in occupationally exposed females.
3. liver disease in occupationally exposed males.
4. birth defects in exposed females.
5. suppression of white blood cells.

(1) (2) (5)

(1) (2) (3)

(1) (4) (5)

(2) (3) (4)

None of the above.