Question

Which of the following verb has a stem change from a to up in the preterite tense

A dar B hablar C saber D andar

Answer 1

C saber

Step-by-step explanation:

a p e x

Answer 2

C. -> Saber

Step-by-step explanation:

You can see the stem change from "a" to "up" in the preterite tense.

Present Simple tense of Saber (to know)

Yo sé

Tu sabes

Él/Ella sabe

Nosotros sabemos

Vosotros sabéis

Ellos/ellas saben

Perfect Preterite Simple tense of Saber (to know)

Yo supe

Tu supiste

Él/ella supo

Nosotros supimos

Vosotros supisteis

Ellos/ellas supieron

Native speaker over here.