Savyabhicara irregular reason – UGC NET Question

Savyabhicara hetu is defective because it "deviates" by appearing in cases that have the probandum and in cases that lack it. This irregularity shows that the alleged vyapti does not hold universally. As a result, the presence of such a hetu in the paksha gives no reliable ground for inferring the sadhya. Nyaya marks this failure with the label savyabhicara hetvabhasa.

Option A:
Option A, viruddha, refers to a reason that actually proves the opposite of the intended conclusion, which is a different and stronger kind of defect than mere irregularity.

Option B:
Option B, asiddha, concerns reasons that are not established in the paksha at all; the problem there is uncertainty about presence, not inconsistency across instances.

Option C:
Option C, badhita, is a reason whose supposed vyapti is defeated by a stronger pramana, such as perception or scripture, rather than one that simply shows wandering association.

Option D:
Option D is correct because savyabhicara literally suggests "deviating" and is used by Nyaya precisely for reasons that fail to exhibit constant agreement with the sadhya in sapaksha and vipaksha cases.