Should I use Sprung or Sprang? [closed]

I just finished my English language exam, and it had the following sentence:

Beads of sweat sprang from his skin

Should it really be sprang? I always thought it was sprung, but I guess they are both valid?

Or is it like effect and affect, and they are used in different places?

Sprang is the past tense:

Beads of sweat sprang from his skin.

Sprung is the past participle:

Beads of sweat have sprung from his skin.

Some dictionaries list sprung as an acceptable past form as well, but others list only sprang. Reverso Conjugator gives lists of the commonly accepted conjugations of [to] spring, if you're interested.