Correct Answer: D

Rationale: Negativism in toddlers commonly occurs around the age of 2 as they begin to assert their independence and autonomy. At this stage, children are exploring their own will and preferences, leading to behaviors like defiance or negativism. Independence (choice D) is the primary need being met by this behavior as toddlers strive to establish their individuality and decision-making. While trust (choice A) is crucial for forming secure attachments, it is not the main need driving negativism in this case. Seeking attention (choice B) may be a behavior exhibited by children, but it is not the fundamental need being fulfilled by negativism. Discipline (choice C) is important for setting boundaries and teaching appropriate conduct, but it is not the primary need being addressed by negativism in toddlers.

Correct Answer: B

Rationale: Clubbing of fingers is a common manifestation in children with tetralogy of Fallot due to chronic hypoxia. Clubbing occurs as a result of long-standing decreased oxygen levels in the blood, leading to changes in the fingertips. Slow respirations (Choice A) are not typically a direct clinical manifestation of tetralogy of Fallot. While decreased RBC counts (Choice C) may occur due to chronic hypoxia, they are not a primary manifestation specific to tetralogy of Fallot. Subcutaneous hemorrhages (Choice D) are not a common clinical manifestation associated with tetralogy of Fallot.

Correct Answer: B

Rationale: By 11 months of age, the recommended vaccines for infants include diphtheria, pertussis, tetanus, and polio. These vaccines are part of the routine immunization schedule to protect infants from serious infectious diseases. Choice A is incorrect because measles is not typically administered at this age. Choice C is incorrect because rubella and tuberculosis are not part of routine infant immunizations. Choice D is incorrect because measles, mumps, and rubella are usually given as a combination vaccine later in childhood, not at 11 months of age.

Correct Answer: D

Rationale: Mouth breathing due to a cleft lip can dry the mucous membranes, increasing their susceptibility to infection. While waste product accumulation (Choice A) and inadequate circulation (Choice B) may contribute to complications, they are not directly related to infection in this context. Inadequate nutrition (Choice C) may affect overall health but is not the primary reason for infection predisposition in this case.

Correct Answer: B

Rationale: Burns on the lips and singed nasal hairs indicate inhalation injury, suggesting the child has inhaled hot gases or smoke. This presentation is common in cases where the respiratory tract is exposed to hot gases or smoke, leading to potential airway compromise. Choice A, chemical burn, is incorrect because there is no mention of exposure to chemicals, and the symptoms described are more indicative of inhalation injury. Choice C, electrical burn, is incorrect as there is no evidence of electrical involvement in the scenario provided. Choice D, hot-water scald, is incorrect because the presence of singed nasal hairs points more towards inhalation injury than a scald from hot water, emphasizing the need to prioritize airway management and respiratory support.