The correct answer is: a) GERC.
The Gujarat Electricity Regulatory Commission (GERC) is an autonomous body established by the Government of Gujarat in 1998 to regulate the power sector in the state. It is responsible for setting tariffs, issuing licenses, and monitoring the performance of power companies.
The Gujarat Urja Vikas Nigam Limited (GUVNL) is a state-owned company that is responsible for generation, transmission, and distribution of electricity in Gujarat. It is not a regulatory body.
The Central Electricity Authority (CEA) is a statutory body under the Ministry of Power, Government of India. It is responsible for planning, coordination, and regulation of the electricity sector in India. It is not a regulatory body for any particular state.
The Power Grid Corporation of India Limited (PGCIL) is a state-owned company that is responsible for the transmission of electricity in India. It is not a regulatory body.