The quickest approach is to match the described conduct, seeking adjournments despite witnesses being present and ready, to the case actually built around that scenario.
Matching the fact pattern to its source, the correct answer is N.G. Dastane v. Shrikant S. Shinde.
Another way to confirm this is to focus on the duty the Court emphasized, an advocate's duty to the court itself as distinct from the duty to the client, and see which case builds its reasoning on that duty in this specific context.
Since the duty to the court against dilatory tactics is the specific holding in the first case, the correct answer is N.G. Dastane v. Shrikant S. Shinde.