The correct answer is A. Defence Research and Development Laboratory.
DRDL is a premier research laboratory of the Defence Research and Development Organisation (DRDO) of India. It is located in Hyderabad, Telangana. The laboratory was established in 1958 to carry out research and development in the field of defence technology. DRDL has made significant contributions in the development of a number of defence systems, including missiles, rockets, guns, and ammunition. The laboratory has also developed a number of indigenous technologies, which have been used in the development of these defence systems.
The other options are incorrect.
Option B, Differential Research and Documentation Laboratory, is not a correct acronym for DRDL.
Option C, Department of Research and Development Laboratory, is not a correct acronym for DRDL.
Option D, None of the above, is not a correct answer.