defence exam DGAFMS Group C 2025 Mock Test Series Quantitative Aptitude Geometry Lines and Angles

প্রদত্ত চিত্রে, MN ∥ AB, ∠OMN = 110°, এবং ∠OAC = 30° হলে, ∠OCA এর মান কত?

1
60°
2
70°
3
50°
4
40°
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