Can we see an attachment of the problem?
<h2>Hey there! </h2>
<h3>The answer is: </h3>
<h3>Option 'B' </h3>

<h2>BECAUSE root 19 is irrational. </h2>
<h2>Hope it help you </h2>
Answer:
Kevin
Step-by-step explanation:
30°
A strait line is 180°
75°+75°=150°
180°-150°=30°