|A||Salicylic acid with lactic acid solution|
1). The human papilloma virus (HPV) is the causative agent for this common STI.
2). Genital warts are painless and do not lead to serious complications, except where they cause obstruction, especially in pregnant women. The removal of the lesion does not mean that the infection has been cured.
3). Podophyllin is the treatment of choice, but is contraindicated in pregnancy as it is teratogenic and the other agents mentioned in the option are also not recommended in pregnancy.
4). Cryotherapy with liquid nitrogen (boiling points -196oC) is preferred treatment in pregnancy. Cryotherapy is non-toxic, does not require anaesthesia and, if carried out properly, does not result in scarring. The other agent which also can be used in pregnancy is TCA.