Choose the correct answer

Which rule correctly produces اِضْرِبْ from تَضْرِبُ?

The Imperative Verb (Fi'l Amr) - Concept & Construction

• Drop ت; the first remaining letter is silent; use Hamzat-ul-Wasl with Kasrah
• Drop ت; use Hamzat-ul-Wasl with Dhammah
• Keep ت and only make the last letter silent
• Change the verb to passive first