Answer:
All answers EXCEPT answer C. are perfect square trinomials.
Step-by-step explanation:
A perfect square trinomial is polynomial that satisfies the following condition:
, 
Let prove if each option observe this:
a) 
1)
Given
2)
Definition of power/Distributive, associative and commutative properties.
3)
,
Definition of perfect square trinomial/Result.
b) 
1)
Given.
2)
Definition of power/Distributive, associative and commutative properties.
3)
,
Definition of perfect square trinomial/Result.
c) 
1)
Given
2)
Distributive property.
3)
Existence of the additive inverse/Modulative property.
4)
Modulative property/Result.
d) 
1)
Given
2)
Definition of power/Distributive, associative and commutative properties.
3)
,
Definition of perfect square trinomial.
All answers EXCEPT answer C. are perfect square trinomials.