Select the set of STDs.

Select the set of opioids.

Select the set of opioids.

Name two STDs.

Select a set of heterosporous genera.

Select the correct set.

Select the correct set.

Write with reasons, which of the following sets are finite or infinite: C = set of all the students of Std. 9 in your school.

(a) Expand STDS (b) Cite any two examples for STDs. (c) Suggest any two methods for the prevention of STDs.

What is STD? Write the preventive measures of STDs