Have you ever been issued a U.S. Visa?

My wife’s visa Details::
H4 valid till Dec 2016
F1 valid till Dec 2020

Entry to US - Visa::
Jan 2014 - H4 (went for stamping)
Jan 2015 - F1 (went for stamping)
Jan 2016 - H4 (didn’t go for stamping, as H4 was valid till Dec 2016)

Her most recent visa stamping is F1 (H4 stamping was before F1). But her most recent entry/ current status in the US is H4.
what should I fill for the following question in DS-160 (H4 or F1 - visa information)-

In section “Previous US travel information”,
question “Have you ever been issued a U.S. Visa?”

Thank you