Who among the following was the author of Tarikh-i-Alai, which contains the details of the first few years of Sultan Alauddin Khilji?

Which one of the following processes takes place in lakes during eutrophication?

The natural dye present in turmeric is known as

Which one of the following is the difference in local time between the places located at 165^oEast and 165^o West?

Which of the following is not correctly matched?

Which among the following planets is smaller in size than the Earth?