Due to the popularity of Buddhism and Jainism, stupas and viharas were constructed on a large scale . However, there are also examples of a few Brahmanical gods in the sculptural representations. It is important to note that the stupas were constructed over the relics of the Buddha at Rajagraha, Vaishali, Kapilavastu, Allakappa, Ramagrama,Vethadipa, Pava, Kushinagar and Pippalvina . These all are in Gangetic valley. Hence, option 2, 3 and 4 are NOT correct. The textual tradition also mentions the construction of various other stupas on the relics of the Buddha at several places including Avanti and Gandhara which are outside the Gangetic valley. Hence, option 1 and 5 are correct.