Final answer:
c) Placing the infant in a head downwards position prior to delivering up to five back blows. Administering abdominal thrusts and placing the infant in a head downwards position are the correct methods to treat a severe airway obstruction in infants.
Step-by-step explanation:
The correct answers are a) Administering abdominal thrusts and c) Placing the infant in a head downwards position prior to delivering up to five back blows.
Administering abdominal thrusts, also known as the Heimlich maneuver, can help remove the obstructing object from the infant's airway. This involves placing the infant facedown on your forearm, supporting their head and neck, and delivering firm back blows between their shoulder blades.
Placing the infant in a head downwards position prior to delivering back blows can help dislodge the obstruction. By holding the infant with their head pointing downwards, gravity can assist in removing the obstructing object during the back blows.