Was a bold, inscriptional arabic lettering with extended, thick characters used widely on coins, manuscripts, and inscriptions on metal and stone.

Kufic

Explanation:

Kufic -

It is a type of Arabic script , which was dominantly used for architectural decoration and Quran transcription , and from that very period of time , it became a piece of reference for other Arabic scripts , is referred to as Kufic.

It was written on the metals  , stones , coins etc.

The characteristic features of this script is that it is horizontal orientation , angular and rectilinear letterforms .

Hence, from the given information of the question ,

The correct term is Kufic.

answer; /// (c) i believe that the correct answer is; ///full faith and credit.