1. Department for Continuing Education, University of Oxford, Rewley House, 1 Wellington Square, Oxford, OX1 2JA, UK
2. Department of Chemistry, Faculty of Science, Dayalbagh Educational Institute Agra, 282005, India
3. School of Foreign Languages, Aligarh Regional Centre, Indira Gandhi National Open University, Maidan Garhi, New Delhi – 110068, India
4. Mangalayatan University, Beswan, Aligarh, Uttar Pradesh, India
5. Amity University, Noida Campus, Sector 125, Noida, 201313, Uttar Pradesh, India
6. Department of Physics, Faculty of Science, Dayalbagh Educational Institute Agra, 282005, India