Hemophilia A is characterized by:

Correct Answer: C

Rationale: Hemophilia A is due to Factor VIII deficiency, leading to prolonged activated partial thromboplastin time (APPT), while PT and bleeding time remain normal.

Correct Answer: C

Rationale: Histamine is a primary mediator released from mast cells during allergic reactions.

Correct Answer: B

Rationale: Dehydration is not a contributing factor for BPD; in fact, fluid overload is more commonly associated. The other factors are known contributors to BPD.

Correct Answer: C

Rationale: Bag-mask ventilation (Ambu bag) can be used with or without oxygen to support respiration in BLS.

Correct Answer: A

Rationale: Automation can lead to job displacement as machines replace human workers in various industries, particularly those involving repetitive tasks.