answer: hey there,
the answer you are looking for is a..
hope this you!
m∠5 + m∠3 = m∠1 is true.
m∠5 + m∠6 = 180 is true
m∠2 +m∠3 = m∠6 is true
m∠2 +m∠3 +m∠5 = 180 is true