Use of Nitrous Oxide-Oxygen Analgesia in Pregnancy Has Been Assigned

Use of nitrous oxide-oxygen analgesia in pregnancy has been assigned a rating by the Food and Drug Administration (FDA) .Studies demonstrate increased congenital anomalies,altered immune responses,spontaneous abortion,and increased birth defects when nitrous oxide-oxygen analgesia is used frequently throughout pregnancy.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true,the second is false.
D) The first statement is false,the second is true.