Which cationic detergent is used in hair conditioners?

$A$ $16$-year-old boy visits a doctor complaining of sneezing,watery eyes,and a runny nose,along with constant itching in the eyes. He also has a known allergy to dust. Which medicine will the doctor recommend?

Which of the following is a good example of a psychotherapeutic agent?

Substances used in bringing down the temperature in high fevers are called

Identify an artificial sweetener $(A)$ and tranquilizer $(B)$ from the following.

What is morphine used as?