What is the age range typically associated with adolescence?

The correct answer is Option (2) → 12-18 years

Adolescence is the stage that links childhood with adulthood. It brings many biological and behavioural changes, and it is a vulnerable phase of mental and psychological development. The book fixes this period by age as 12 to 18 years. The range 6-12 years is still childhood, and 18 years and above is adulthood.

NCERT Extract:
Adolescence and Drug/Alcohol Abuse – “Adolescence means both ‘a period’ and ‘a process’ during which a child becomes mature in terms of his/her attitudes and beliefs for effective participation in society. The period between 12-18 years of age may be thought of as adolescence period. In other words, adolescence is a bridge linking childhood and adulthood. Adolescence is accompanied by several biological and behavioural changes.”