Assertion (A) : Muhammad bin Tughlaq issued a new gold coin which was called Dinar by Ibn Batutah. Reason (R) : Muhammad bin Tughlaq wanted to issue token currency in gold coins to promote trade with West Asian and North African countries.

Assertion (A) is true: Muhammad bin Tughlaq introduced a well-designed, 200-grain gold coin. The renowned Moroccan traveler Ibn Battuta, who spent several years in his court, specifically referred to this new gold coin as the Dinar.

Reason (R) is false: Muhammad bin Tughlaq did not issue token currency in gold. His famous token currency experiment (1330 CE) involved minting coins made of base metals like copper and brass, and decreeing that they would hold the same legal value as the silver Tanka. His primary motives for this experiment were to overcome a severe shortage of silver and to finance his massive military campaigns and administrative projects, not to promote foreign trade through gold token coins.

Therefore, the assertion is correct, but the given reason is factually incorrect.