I believe the answer is: Object permanence
Object permanence refers to the cognitive understanding that an object would remain exist even if we stop paying attention to it.
For average infants, the concept of object permanence would started to developed by the age of 4-7 months old.
The correct answer would be, recumbent position.
In the Radiology Department, Patient A is directed to lie face up on the exam table, whereas Patient B is directed to lie face down. Both of these patients can be said to be in the Recumbent Position.
Explanation:
When a person is lying horizontally, or is resting in a straight horizontal position, he is said to be in the Recumbent Position. In this position, the face of the person can be upside or downside. The person with both the positions of the face is said to be in the Recumbent Position.
Radiology is the department in medical sciences. This discipline uses medical imagining technology to first diagnose and then treat the disease. Radiology is used to diagnose and treat the disease in the bodies of both humans and animals.
So for radiology, the person is made to rest in recumbent position.
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It should be the first, third, and last one