D i.e. Refer to psychiatristDelusion is a false unshakable belief which is not in keeping with the patient's social culture & educational background.Delusional dysmorphophobia is a delusional disorder in which patient has delusion about his/her body (or its pa mostly nose) being ugly or misshappen.So this lady in question is a case of delusional dysmorphophobia, so ressurance is not going to help (as her belief is firm & unshakable) without proper psychotherapy. Thus the most appropriate answer is refer to psychiatrist.