An effect of Chlamydia is painful urination. Thus, the correct option is A.
Chlamydia may be defined as a common type of STD which is caused by bacteria. It can cause infection in both males and females but severely damage the reproductive system of women. It is a curable STD.
It can infect the rectum part of an individual. Though it is related to genital disease, it affects the process of eliminating urine. Hence, this makes urination painful.
Therefore, an effect of Chlamydia is painful urination. Thus, the correct option is A.
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