Gifting which of the following was an established diplomatic custom under the Mughals?

Precious manuscripts

The gifting of precious manuscripts was an established diplomatic custom under the Mughals. In emulation of this, the Nawab of Awadh gifted the 'illustrated Badshah Nama' (One containing paintings along with written text) to King George III in 1799. Since then it has been preserved in the English Royal Collections, now at Windsor Castle.
In 1994 conservative work required the bound manuscript to be taken apart. This made it possible to exhibit the paintings, and in 1997 for the first time, the Badshah Nama paintings were shown in exhibitions in New Delhi, London and Washington.