Which of the following are insecticides?

Which of the following plants is useful for extracting an analgesic compound?

What are the main constituents of Dettol?

Chloramine-$T$ is a

Which of the following is useful for lowering blood pressure?

Given below are two statements: One is labelled as Assertion $A$ and the other labelled as Reason $R$.
Assertion $A:$ Antihistamines do not affect the secretion of acid in stomach.
Reason $R :$ Antiallergic and antacid drugs work on different receptors.
In the light of the above statements,choose the correct answer from the options given below: