Which of the following contraceptives provides complete protection against sexually transmitted disease: March 2013 (b, g)

Social & Preventive Medicine

Which of the following contraceptives provides complete protection against sexually transmitted disease: March 2013 (b, g)

A study is to be conducted with regards to the fat content…

'There has been a gradual increase in number of non-communicable disease cases…

All of the following are done to remove Confounding except