A researcher was assigned to conduct a study on the evaluation of the community reaction towards legalization of medical abortion. Data was collected from 500 male participants from a different Keble. He ultimately analyzed and published his paper as the reaction of the community towards legalization of medical abortion. What is the most likely bias he introduced? a. Non-response bias b. Self reporting bias c. Social desirability bias d. Selection bias

The most likely bias introduced in this scenario is **d. Selection bias**.<br /><br />Selection bias occurs when the sample selected for a study is not representative of the population of interest. In this case, the researcher collected data only from male participants, which is not representative of the community's reaction towards the legalization of medical abortion. The community likely includes individuals of various genders, and excluding one gender can lead to a biased sample that does not accurately reflect the views of the entire community.