সঠিক উত্তর হচ্ছে: Pneumonia
ব্যাখ্যা: Leo Tolstoy died from pneumonia, aged eighty-two, at the railway station of Astapovo, a remote Russian village, on November 7, 1910. He had left his family home on October 28, in the middle of the night, walking out on his wife of forty-eight years—the long-suffering and increasingly paranoid Sonya.