Who among the following travellers gave an account of the efficient postal system working in India during the time of his visit?

Marco Polo François Bernier Ibn Batuta Al Biruni

Ibn Batuta

Ibn Battuta was amazed by the efficiency of the postal system which allowed merchants to not only send information and remit credit across long distances, but also to dispatch goods required at short notice. The postal system was so efficient that while it took fifty days to reach Delhi from Sind, the news reports of spies would reach the Sultan through the postal system in just five days.