The correct option is C 1, 2 , 3 and 4
Induced Radioactivity:
Radioactivity that is created when stable substances are bombarded by ionizing radiation. For example, the stable isotope cobalt-59 becomes the radioactive isotope cobalt-60 under neutron bombardment.
here, in all four reactions, we are using some particles for bombardment and to make radioactive element so they all are induced radioactive reactions.