This provision actually has two numbers built into it, an ordinary period and an extended outer limit conditioned on recorded reasons, so the safest way to answer is to check which option correctly reflects the outer limit together with its condition, rather than the ordinary period alone.
Since only the ninety-day option correctly pairs the true outer limit with the requirement of recorded reasons, it is the one that accurately states the BNSS timeline for delivering judgment.
Options describing thirty days and ninety days are not really rival, unconnected figures, they describe two different points on the same timeline, the ordinary target and the outer limit for harder cases, so comparing them directly is the most efficient way to reach the answer.
Once the ordinary period and the true outer limit are recognised as two ends of the same rule, the option that states the ninety-day outer limit together with the requirement of recorded reasons is the one that fully and accurately reflects the provision.
Therefore, the correct answer is within 90 days, provided the reasons for delay are recorded.