निम्नलिखित में से कौन सी विशेषता मुख्य रूप से लॉजिट (logit) मॉडल को प्रोबिट (probit) मॉडल से अलग करती है?

Which of the following formulas correctly defines the coefficient of determination (R2)?

Assertion (A): In binary choice models (like Logit and Probit), only the relative magnitudes of the coefficients are identified rather than their absolute values. Reason (R): The variance of the underlying error term is normalized to a fixed value for identification purposes.