Question

how the states of junagadh and hyderabad merged with the indian union

Answer 1

Fast-track integration. The first step in this process, carried out between 1947 and 1949, was to merge the smaller states that were not seen by the Government of India to be viable administrative units either into neighbouring provinces, or with other princely states to create a "princely union".

Answer 2

Iron Man sent the Indian forces to capture these two states and thus these two states merged with India.