Read the following Assertion and Reason and choose the correct option. Assertion: Adolescence is a vulnerable phase marked by significant biological and behavioral changes. Reason: Curiosity, need for adventure, and stress from academic pressures often lead adolescents to experiment with drugs and alcohol.

Step-by-step solution

Smoking also paves the way to hard drugs. Tobacco has been used by human beings for more than 400 years. It is smoked, chewed or used as a snuff. Tobacco contains a large number of chemical substances including nicotine, an alkaloid. Nicotine stimulates adrenal gland to release adrenaline and nor-adrenaline into blood circulation, both of which raise blood pressure and increase heart rate. Smoking is associated with increased incidence of cancers of lung, urinary bladder and throat, bronchitis, emphysema, coronary