The question asks which individual was not conferred the Padma Awards as approved by the President of India in 2015. Let's evaluate the given options one by one:
Given the options, Lakshmi Gopala Naidu was not one of the recipients. Thus, the correct answer is:
Lakshmi Gopala Naidu
The DDR&D deals with research and development of defence technologies, systems, and equipment. DDR&D stands for: