Answer:
The correct answer will be option-D
Explanation:
The biological Edema refers to the swelling of any portion of the body which could be small or large. The swelling is caused when the fluid from the blood vessel is leaked to the nearby tissue which causes the redness also.
Edema is assessed by measuring the depth of the pit formed by swelling in which 4+ edema shows that the edema is very deep pitted (6-8mm) which could last for 2-5 minutes.
Thus, option-D is the correct answer.