In Indian social issues literature, the Hindi book "Azad Bachpan Ki Aur" is written by which author and child rights activist?

Introduction / Context:
This question connects general knowledge of books and authors with awareness of social reformers. "Azad Bachpan Ki Aur" is a Hindi work focused on child rights and the dream of a childhood free from exploitation. It is directly linked to the Nobel Peace Prize winning activist who has devoted his life to the fight against child labour in India.

Given Data / Assumptions:

- The title of the book is "Azad Bachpan Ki Aur".

- The book deals with childhood freedom and social justice themes.

- Four options list public figures connected to law, activism, or public life.

- Exactly one option names the known author of this book.

Concept / Approach:
The conceptual key is to associate the theme of free childhood and child rights with the correct personality. "Azad Bachpan Ki Aur" is a collection of essays and reflections by Kailash Satyarthi, who is recognised globally for his campaigns against child labour and for education. He is the most natural match out of the given options because his life work directly reflects the subject of the book.

Step-by-Step Solution:
Step 1: Observe the meaning of the title, which translates roughly to "Towards a Free Childhood". This already hints at child rights activism. Step 2: Recall that Kailash Satyarthi, an Indian activist and Nobel Peace Prize laureate, has authored works documenting his struggles, movements, and vision for child friendly policies. Step 3: Compare this with the other names: Radhakant Bharti and Subhash Chandra do not have strong mainstream associations with this specific book, while Dipak Misra is known as a judge of the Supreme Court. Step 4: Match the title and theme to Kailash Satyarthi and select him as the author of "Azad Bachpan Ki Aur".

Verification / Alternative check:
As an additional check, one can remember news articles and exam preparation notes which clearly mention that "Azad Bachpan Ki Aur" is Satyarthi's first Hindi book compiling his articles on landmark movements and judgments linked to child rights. No such references credit the other options as the author of this title, so the identification is secure.

Why Other Options Are Wrong:
Radhakant Bharti is not widely recognised as the writer of this collection on child rights, so that option is misleading.
Dipak Misra is a former Chief Justice of India who released the book at one event, which may confuse learners, but he did not write it.
Subhash Chandra is associated with media and politics, not with authoring this child rights book.

Common Pitfalls:
A frequent mistake is to confuse the person who launches or unveils a book with the author, especially when a judge or senior official is present at the release. Another pitfall is focusing only on name familiarity and ignoring the theme of the title, which clearly hints at Kailash Satyarthi's work. Learners should always link the subject of the book to the life and contributions of the personalities in the options.

Final Answer:
Therefore, the Hindi book "Azad Bachpan Ki Aur" is authored by Nobel laureate and child rights activist Kailash Satyarthi.