Dilation of blood vessels,increase in fat synthesis,low blood sugar and inflammation of stomach are due to the consumption of

Identify the correct statements from the following:
$(i)$ With repeated use of drugs,the tolerance level of the receptors present in the body increases.
$(ii)$ Youngsters often use drugs repeatedly due to financial gains.
$(iii)$ Lack of proper guidance or counseling leads individuals to become addicts.
$(iv)$ Repeated use of alcohol leads to 'withdrawal syndrome'.

What is meant by unpleasant withdrawal syndrome?

Opium is a derivative of which of the following?

Identify the components that induce nerve stimulation and muscle relaxation.

Which of the following effects is $NOT$ caused by smoking?