Its the third one..........
Perpendicular: slope is -3/2
Based on this I would already know the answer is A.
Answer:

Step-by-step explanation:
To find : Convert
into 
Solution :
We convert units one by one,



Converting temperature unit,


So, 
Substitute all the values in the unit conversion,



Therefore, The conversion of unit is 
78 / 0.26 = 300 so the answer is 300
-3/5 to get 10 then divide 10 by 2/3.