Field theory rendered by- (क्षेत्र सिद्धांत का प्रतिपादन किया)a.Vrdimar (वर्दीमर)b.Kohler (कोहलर)c.Levin (लेविन)d.None of these (उपरोक्त में से कोई नहीं)

The concept of field theory is a fundamental aspect of physics, especially in the areas of electromagnetism and quantum mechanics. It has roots in various important developments by numerous physicists. However, when it comes to the specific individuals mentioned in your question regarding who rendered field theory, it is notable that:

1. Kohler (कोहलर) is not typically associated with the foundational aspects of field theory as it is commonly understood.
2. Levin (लेविन) also does not have a well-recognized contribution directly related to field theory.
3. Vrdimar (वर्दीमर) appears to be an unfamiliar name in this context and may not relate to the established historical figures in field theory.
4. None of these (उपरोक्त में से कोई नहीं) seems to be the most accurate option given that the more recognized figures in field theory, such as James Clerk Maxwell or Albert Einstein, are not listed here.

Based on this analysis, the best choice would be d. None of these (उपरोक्त में से कोई नहीं). It's always beneficial to refer to widely acknowledged scientific literature for definitive contributions in the field of physics.