Can you help me answer this scenario? I just need your personal insight so I can check if my answer is correct. Here is the question:

Suppose a case between A and B is resolved in the MTC level, then the RTC; then the CA on a question of law being raised for the first time, and suppose the same was not raised before the Supreme Court, will this ruling of the CA form part of the legal system and be binding before all other lower courts?