During which stage of risk planning are risks prioritized based on probability and impact?

it should be Perform Qualitative Risk Analysis as in this stage only we prioritized risk as High and Low based on there probability and impact.

d) %%%%********0()Identify Risk%%%%%%^#$##%%^&$$

^^^^^^^^^^^^^^^^^^^^a) Perform Qualitative Risk Analysis^^^^^^^^^^^^^^

My Answer is 

>>>>(a) Perform Qualitative Risk Analysis

I will go with A.

Qualitative analysis and(or) quantitative analysis is the stage that will help in prioritize risk or in other words in ranking risks.

Risk is always Risk :)

Risk Analysis means you are in the Project Planning Stage not in Execution.  Probability/Impact is part of   Qualitative Risk Analysis.

as an output from perform qualitative risk analysis project document update which include update risk register and prioritize the the risk based on its probability and impact  

a) Perform Qualitative Risk Analysis

Qualitative Risk Analysis.

I think the answer is:  ( a ) Perform Qualitative Risk Analysis

>>>>>>>>>>> a) Perform Qualitative Risk Analysis >>>>>>>>>>>>