Which sti is a common cause of cancer?
a. chlamydia
b. syphilis
c. human papilloma virus
d. herpes

The correct answer is c - human papilloma virus.

Human papilloma virus (HPV)  is among a family of over 100 viruses. They include the viruses which cause works warts. Transmission is through skin to skin contact.

Human papilloma viruses are now recognized as the major cause of cervical cancer . They play a role in cancers of the anus, vulva, vagina and some cancers of the oropharynx - the middle part of the throat that also includes the soft palate, the base of the tongue and the tonsils.

Human papilloma virus infection may also cause cancer of the penis.

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.