4 is B.
5 is true.
6- Statement 3: NO and ON are the same line. They are congruent by the reflexive property (a line segment is a reflection of itself)
Statement 4: Shape MNO and shape PON are congruent by side-side-side since:
side PN = side MO
side MN = side PO
side NO = side ON
So the answer would be D
Hope that helps!
