The book "The Peoples President: Dr A P J Abdul Kalam" is authored by which of the following?

Introduction / Context:
This question asks about a biography of one of India's most admired presidents, Dr A P J Abdul Kalam. Many books have been written either by him or about him, so exams often test whether candidates can distinguish between titles he authored and titles written by others about his life. "The Peoples President: Dr A P J Abdul Kalam" belongs to the second category and has a specific author that must be remembered.

Given Data / Assumptions:

- The book title is "The Peoples President: Dr A P J Abdul Kalam".

- The options list four Indian public figures.

- One of them is the biographer, not the subject of the biography.

- The question is purely about correct matching of title and author.

Concept / Approach:
The conceptual step is to separate Dr Kalam's own works like "Wings of Fire" from books written about him. "The Peoples President: Dr A P J Abdul Kalam" is written by S M Khan, who served in senior positions and had a close professional association with him. By remembering that this biography was authored by an officer and communication professional rather than a politician or speaker, the learner can choose correctly.

Step-by-Step Solution:
Step 1: Recall that S M Khan worked as a senior official involved with the President's office and later wrote about Kalam's life and contributions. Step 2: Recognise that Tarun Vijay is a journalist and politician who has written on other topics, but is not usually credited as the author of this book. Step 3: Note that Sumitra Mahajan and K C Pant have served in public office but are not associated with this biography as authors. Step 4: Eliminate these distractors and identify S M Khan as the correct author of "The Peoples President: Dr A P J Abdul Kalam".

Verification / Alternative check:
A secondary check is to recall cover images or news articles about the release of this book, which clearly name S M Khan as the author. Exam preparation books that list biographies of Kalam also mention this title under his name. Since none of the other options appear in those references, the matching of title to author is reliable.

Why Other Options Are Wrong:
Tarun Vijay has written on national issues but is not credited with this biography.
Sumitra Mahajan is a senior political leader and former Lok Sabha Speaker, not the writer of this book.
K C Pant is known for his roles in government and policy, not for writing "The Peoples President".

Common Pitfalls:
A typical pitfall is to guess the name of a well known politician or media figure instead of the relatively less familiar S M Khan. Another error is mixing up multiple biographies of Kalam and assuming that a different writer authored this particular title. Building a small table that links each Kalam related book to its correct writer is a practical way to avoid confusion.

Final Answer:
"The Peoples President: Dr A P J Abdul Kalam" is authored by S M Khan.