MCQ
In a Quadrilateral $ABCD$, $\angle\text{A} = \angle\text{C},\ \angle\text{B} = 2\angle\text{A}, \ \angle\text{D} = \frac{1}{21}\angle\text{A}.$ Then $\angle\text{A}, \ \angle\text{B}, \ \angle\text{C} $ and $\angle\text{D}$ respectively are:
- ✓$80^\circ,\ 160^\circ,\ 80^\circ,\ \text{and}\ 40^\circ$
- B$20^\circ,\ 30^\circ,\ 160^\circ,\ \text{and}\ 160^\circ$
- C$100^\circ,\ 100^\circ,\ 80^\circ,\ \text{and}\ 80^\circ$
- D$90^\circ,\ 90^\circ,\ 90^\circ,\ \text{and}\ 90^\circ$