The correct option is C Both (a) and (b) above
On April 8, 1929, Bhagat Singh, along with Batukeshwar Dutt, hurled two bombs inside the Central Legislative Assembly in New Delhi. It was done to protest against the Defence of India Act. The bomb neither killed nor injured anyone. Singh and Dutt both were sentenced to ‘Transportation for Life‘ for the bombing on 12 June 1929.