Explanation:

The fruit referred to as 'King of Arid fruits' is Ber (Indian Jujube), which is often translated as Durian in some contexts (though botanically distinct, the Hindi 'बेर' points to Jujube). Ber (*Ziziphus mauritiana*) (C) thrives in arid and semi-arid regions due to its drought tolerance. Mango (A) is generally 'King of Fruits'. Avocado (B) and Apple (D) are typically grown in more temperate or subtropical, non-arid climates. Therefore, (C) is the most appropriate answer in this context.