A is incorrect because if you follow PEMDAS, the answer to the left side of the equation is 34:
8/4 = 2
32 + 2 = 34
B is correct since when you follow PEMDAS, since the answer to both sides is 10:
12/2 = 6
4 + 6 = 10
C is false because the left side equals 14 when following PEMDAS:
6/3 = 2
12 + 2 = 14
D is correct because when you follow PEMDAS, the answer on both sides is 45:
20 - 5 = 15
15 * 5 = 45
So the correct answers are B and D! Hope this helped u! :)