1 year ago in Science and Technology

​A team of researchers at which of the following have developed a cup-shaped design of face mask that helps to create enough space in front of the mouth while speaking?

[A] National Center For Biological Sciences
[B] Jawaharlal Nehru Centre For Advanced Scientific Research
[C] Raman Research Institute
[D] Centre for Nano and Soft Matter Sciences
[E] Physical Research Laboratoray 
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