Which of the only four available pints of blood (A+, AB–, B–, and O+) should the patient receive for a transfusion? 1. B-

2. AB-

3. A+

4. O+

O+ because it is a general donor to all the positive blood groups

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

this is a good question! i'll do some research and come back when i have the answer!