What is the meaning of the Hindi idiom "उड़ती चिड़िया पहचानना"?

The question asks to choose the option that best expresses the meaning of the given Hindi idiom (मुहावरा).

The idiom is: "उड़ती चिड़िया पहचानना" (Udti Chidiya Pehchanana).

This idiom literally translates to "to recognize a flying bird." However, as an idiom, its figurative meaning refers to someone who is very perceptive, shrewd, and experienced, capable of understanding hidden intentions or situations from subtle clues. Such a person can quickly grasp the essence of a matter without needing explicit details.

Let's analyze the given options:

1. बिलकुल धूर्त होना (Bilkul Dhoort Hona) - To be completely cunning or deceitful. While a perceptive person might be shrewd, the core meaning of the idiom is not about deceit but about insight and experience.
2. बहुत अनुभवी होना (Bahut Anubhavi Hona) - To be very experienced. This option aligns well with the idiom's meaning. An experienced person often possesses the insight and understanding to "recognize a flying bird," meaning they can discern subtle cues and understand underlying realities.
3. बड़ी-बड़ी बातें करना (Badi-Badi Baatein Karna) - To talk big or boast. This meaning is unrelated to the idiom.
4. प्रकृति प्रेमी होना (Prakriti Premi Hona) - To be a nature lover. This is a literal interpretation of "चिड़िया" (bird) and "उड़ती" (flying), but idioms are figurative.

Based on the figurative meaning of the idiom, "बहुत अनुभवी होना" (to be very experienced) is the most appropriate choice, as experience often leads to the kind of perceptiveness described by "उड़ती चिड़िया पहचानना."

The final answer is $\text{बहुत अनुभवी होना}$