Question

In which of the following cases did the Supreme Court of India uphold the refusal of a patent for the beta crystalline form of imatinib mesylate on the ground that it was a new form of a known substance not showing enhanced efficacy?

A Bishwanath Prasad Radhey Shyam v. Hindustan Metal Industries
B F. Hoffmann-La Roche Ltd. v. Cipla Ltd.
C Natco Pharma Ltd. v. Bayer Corporation
D Novartis AG v. Union of India
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