Option 1, the Biodiversity Authority, is not dealt under Section 3`c` of the Environment (Protection) Act, 1986. This section specifically deals with the authority set up to monitor the state of notified ecologically sensitive areas.

Option 2, the Coastal Zone Management Authority, may be dealt under Section 3`c` of the Act, as the act aims to protect and conserve coastal zones.

Option 3, the authority set up to monitor the state of notified ecologically sensitive areas, is specifically mentioned in the question as being dealt under Section 3`c`.

Option 4, Protection of Plant Varieties and Farmers Right Authority, is not dealt under Section 3`c` of the Act. This authority may be covered under separate legislation or regulations related to the protection of plant varieties and the rights of farmers.

In summary, option 4 is the correct answer, as it is not dealt with under Section 3`c` of the Environment (Protection) Act, 1986.