Repeated use of drugs increases the tolerance level of which receptors in the body?

Which chemicals are released into the blood due to the effect of nicotine?
$(i)$ Thyroxine
$(ii)$ Adrenaline
$(iii)$ Noradrenaline
$(iv)$ Insulin

From which of the following are drugs/narcotics generally obtained?

Which drug is obtained from the dried flowering tops of a plant?

Which syndrome is caused by the sudden withdrawal of drugs or alcohol?

Which of the following are useful suggestions for the prevention and control of alcohol and drug abuse during adolescence?
$(1)$ Avoid undue peer pressure
$(2)$ Seeking professional and medical help
$(3)$ Looking for danger signs
$(4)$ Education and counselling
$(5)$ Seeking help from parents and peers