Which pair best illustrates the explicit–allusive distinction?

Explicit and Allusive Wording: Clarity, Intention and Legal Effect

• “Anta ṭāliq” explicit; “anta bāʾin” allusive
• “Anta bāʾin” explicit; “anta ṭāliq” allusive
• Both “biʿtu” and “ishtaraytu” allusive
• Both “anta ḥurr” and “anta ṭāliq” allusive