सामान्य व्यक्ति में दिल की धड़कन की औसत दर होती है ? - What is the average heart rate in a normal person? - Samanya Vyakti Me Dil Ki Dhadkan Ki Average Dar Hoti Hai ? General Science in hindi, Biology 92 question answers in hindi pdf 72 questions in hindi, Know About 82 General Science online test General Science notes in hindi quiz book 98