who has power to summon the session of state legislature
Governors of states of India The governor summons the sessions of both houses of the state legislature and prorogues them. The governor can even dissolve the Vidhan Sabha. These powers are formal and the governor while using these powers must act according to the advice of the Council of Ministers headed by the Chief Minister.
Parliament of India The period during which the House meets to conduct its business is called a session. The Constitution empowers the president to summon each House at such intervals that there should not be more than a six-month gap between the two sessions. Hence the Parliament must meet at least twice a year. In India, the parliament conducts three sessions each year:[15]