After storming Sirhind, Banda Bahadur adopted the title of Padshah, started a new calendar and issued coins bearing the names of which Gurus ?
1. Guru Nanak and Guru Hargobind
2. Guru Nanak and Guru Gobind Singh
3. Guru Hargobind and Guru Arjan
4. Guru Gobind Singh and Guru Tegh Bahadur