The main objective of the Department of Atomic Energy is

to generate safe, economic electrical power from nuclear energy
to built research reactors and to utilize the radioisotopes
to encourage technology transfer and interaction with industry for industrial & social development
None of the above

The correct answer is A. to generate safe, economic electrical power from nuclear energy.

The Department of Atomic Energy (DAE) is a government agency in India that is responsible for the development and application of nuclear energy. The DAE was established in 1954 with the objective of harnessing the peaceful uses of nuclear energy for the benefit of the people of India.

The DAE has been successful in achieving its objective of generating safe, economic electrical power from nuclear energy. India has the fourth largest installed nuclear power capacity in the world. The DAE is also engaged in research and development in the field of nuclear energy, and has made significant contributions in the areas of nuclear reactor technology, fuel cycle management, and radioisotope production.

The DAE is also committed to the safe and responsible use of nuclear energy. The DAE has a comprehensive safety program in place, and has a strong track record of safety. The DAE is also committed to the peaceful uses of nuclear energy, and has a strong non-proliferation policy.

The DAE is a valuable asset to India. The DAE has made significant contributions to the development of India’s nuclear power program, and has also made significant contributions to the fields of research and development, and safety. The DAE is committed to the safe and responsible use of nuclear energy, and to the peaceful uses of nuclear energy.

Option B is incorrect because the DAE is not responsible for building research reactors. The DAE is responsible for the development and application of nuclear energy, but it does not build research reactors. Research reactors are built by other organizations, such as the Bhabha Atomic Research Centre (BARC).

Option C is incorrect because the DAE is not responsible for encouraging technology transfer and interaction with industry for industrial & social development. The DAE is responsible for the development and application of nuclear energy, but it does not encourage technology transfer and interaction with industry for industrial & social development. This is the responsibility of other organizations, such as the Department of Science and Technology (DST).

Option D is incorrect because the DAE is a real organization with a real objective. The DAE is not a fictional organization, and it does have an objective. The objective of the DAE is to generate safe, economic electrical power from nuclear energy.