The correct answer is B. RPR.

Patient has moth-eaten alopecia of secondary syphilis. The correct answer is RPR to screen for syphilis.

Copper and zinc levels are not necessary. The hair loss is not consistent with androgenetic alopecia, but even if it were you do not need free testosterone and total testosterone levels to make that diagnosis. ESR and CRP are non-specific tests to evaluate for inflammation in the body and are not useful in this setting.

References:

Qiao J, Fang H. Moth-eaten alopecia: a sign of secondary syphilis. CMAJ. 2013;185(1):61. doi:10.1503/cmaj.120229

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