The Arabic work of al-Biruni that gave an account of the subcontinent is called __________.
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The first large scale electrical air conditioning was invented and used in 1902 by
Who invented the thermos flask?
Who discovered the colour photography?
Who Invented Neon Lamp?
Who among the following is NOT a famous dancer of Bharatanatyam?
Gandhiji's 'Satyagraha' meant an attachment to the following two elements
The Agra fort was built by ___________.