Explanation:

Milk teeth, also known as primary teeth or deciduous teeth, consist of 20 teeth in total, which include:

• 8 Incisors (Front teeth)
• 4 Canines (Pointed teeth)
• 8 Molars (Back teeth)

However, Premolars (Bicuspids) are not present in milk teeth. They appear later when the permanent teeth replace the primary molars, usually around the age of 10-12 years.

Thus, premolars are not included in the milk teeth of a child aged 3-4 years, making option (B) the correct answer.