माना \(A\) रेखाओं \(L_1: \frac{x-7}{1}=\frac{y-5}{0}=\frac{z-3}{-1}\) और \(L_2: \frac{x-1}{3}=\frac{y+3}{4}=\frac{z+7}{5}\) का प्रतिच्छेदन बिंदु है। माना \(B\) और \(C\) क्रमशः रेखाओं \(L_1\) और \(L_2\) पर बिंदु हैं इस प्रकार कि \(\mathrm{AB}=\mathrm{AC}=\sqrt{15}\)। तो त्रिभुज ABC के क्षेत्रफल का वर्ग ___ है।

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.