Jahnavi is the sister of Taruni. Taruni is married to Dilip. Dilip is the father of Raghu. Manoj is the son of Hema. Taruni is the mother-in-law of Hema. Dilip has only one son and no daughter. Jahnavi is married to Barun. Lekha is the daughter of Barun. How is Jahnavi’s sister related to Manoj’s paternal grandfather?
Who among the following science fiction/ popular science writers wrote ‘2001 : A Space Odyssey’ and held the position of a Professor at the Physical Research Laboratory, Ahmedabad?