Respuesta :
Answer: First option is correct.
Step-by-step explanation:
Since we have given that
m∠3= m∠7
⇒ alternate interior angles are equal
⇒ corresponding lines must be parallel.
⇒AB ║DC
⇒ AB is parallel to DC.
So, from the given instance, we deduce that the line segments AB and DC are to be parallel.
Hence, First option is correct.