Correct option is C
Hypertension with proteinuria after 20 weeks of gestation is diagnostic of preeclampsia. Absence of seizures differentiates it from eclampsia.
Explanation of options: (a) ✘ Gestational hypertension = high BP after 20 weeks without proteinuria. (b) ✘ Chronic hypertension starts before 20 weeks or pre-pregnancy. (c) ✔ Correct; HTN + proteinuria after 20 weeks = preeclampsia. (d) ✘ Eclampsia = preeclampsia + seizures, not present here.