A 9-month-old girl is brought to the clinic for a routine health visit. She has been healthy with no significant past medical history. Her mother states that she starts looking for her toys even when they are out of sight. She can sit well and pulls to stand. She can also say mama and dada. Which of the following is an expected finding at this age?
A. Temper tantrums
B. Separation anxiety
C. Aggression
D. Self-identity outside of the family
E. Symbolic pretend play

A young boy is brought to the clinic for a routine check-up. He has a past medical history of atopic dermatitis. The father states that his son has been very active, he hops, walks up and down the stairs with alternating feet, and has started to like drawing. He can dress and undress without much help and uses 4-word sentences. Which of the following is the most likely age of this child?
A. 1 year old
B. 2 years old
C. 3 years old
D. 4 years old
E. 5 years old

A 2-year-old boy is brought to the office by concerned parents. According to the parents, the boy can say approximately 30-40 words. He can walk upstairs, jump, build a 6-block tower, and follow short commands. The mother adds that he has always been a happy kid who enjoys being with his family. He also plays with other kids but he doesn't speak that much. His siblings started using sentences by age of 2. The mother asks if there is something wrong with him. How would you address the parent's concerns?
A. His speech delay raises concern for autism spectrum disorder (ASD), so should be evaluated further.
B. There is nothing to worry about; his developmental milestones are within the normal range.
C. Every child is different, he should be re-evaluated next year.
D. He may have a language disorder and should be further evaluated.
E. This is selective mutism and can be easily treated.

A 6-month-old boy is brought to the physician for a routine well-child examination. He has been breastfeeding well and recently started solid foods. He is at the 40th percentile for length, 50th percentile for weight, and 60th percentile for head circumference. On examination, the baby sits on propped hands. He transfers his bottle from his right to the left hand. He turns and smiles when his father calls his name, revealing a mandibular central incisor. He does not pull to a stand. Moro and grasp reflexes are absent. Babinski sign is positive. Which of the following is the most appropriate assessment of this child's development?
A. Gross Motor: Normal, Fine motor: Normal, Cognitive: Normal
B. Gross Motor: Delayed, Fine motor: Delayed, Cognitive: Delayed
C. Gross Motor: Delayed, Fine motor: Normal, Cognitive: Delayed
D. Gross Motor: Delayed, Fine motor: Normal, Cognitive: Normal
E. Gross Motor: Normal, Fine motor: Delayed, Cognitive: Delayed

A 6-year-old boy has just started first grade. He is being referred because he has been manifesting agitation, frustration, and some hyperactivity. His teacher has reported to his parents that he wants very much to attend and learn but seems to miss important instructions or concepts at times while grasping others easily. He then has outbursts in class that are disruptive. His parents report this as new behavior. In addition to attention-deficit/hyperactivity disorder, differential diagnosis should also include which one of the following disorders?
A. Conduct disorder
B. Seizure disorder
C. Oppositional defiant disorder
D. Intermittent explosive disorder
E. Language disorder