MCQ PracticeIn a ΔABC, ∠A + ∠B = 75° and ∠B + ∠C = 140°, then ∠B is:Subject: MathematicsTopic: TrianglesA40°B35°C50°D45°Correct Answer: BPractice QuizBack to MCQsRelated MCQsCellulose is the major component of__________?Which of the following cytoskeletal fiber contain tubulin protein?Number of cervical vertebrae is_____________?