<prompt> Which of the following is not true regarding thumb sucking?Is a sign of insecurityPleasurable sensationLeads to dental problemsSeen only in child 4 years of age  <response>: Thumb sucking: common in infancy and in as many as 25 of children age 2 yr and 15 of children age 5 yr. self-soothing behavior Leads to dental problems Tt- Behavioural therapy 