MCQ PracticeAt age of ___________ holy Prophet received first Wahi.Subject: Islamic StudiesTopic: Islamic StudiesA38 YearsB39 YearsC40 YearsD41 YearsCorrect Answer: CPractice QuizBack to MCQsRelated MCQsHydrogen has a heat transfer co-efficient _____ times that of airIt is required to measure the true open circuit e.m.f. of a battery. The best deTo avoid the effect of stray magnetic field in A.C. bridges we can use