12345678910 1). Mars appears red because of presence of the following compounds on its surface? Copper Oxide Iron Oxide Copper Sulphide Magnesium Oxide 2). Who among the following was the immediate successor of Guru Nanak? Guru Angad Guru Arjun Guru Amardas Guru Ramdas 3). Surdas was a disciple of which among the following? Ramanujacharya Ramananda ..