Who directed the biographical film \"The Man Who Knew Infinity\" about mathematician Srinivasa Ramanujan?

Introduction / Context:
This question checks knowledge of films related to famous scientists and mathematicians. The Man Who Knew Infinity is a biographical movie about the life of Indian mathematical genius Srinivasa Ramanujan and his collaboration with G. H. Hardy at Cambridge. Recognising the director of such a film helps students connect cinema with history of science and Indian contributions to mathematics, which sometimes appears in culture and current affairs sections of competitive examinations.

Given Data / Assumptions:

• The film title is The Man Who Knew Infinity.
• The movie is based on the life of Srinivasa Ramanujan.
• Options give four well known director names and an extra alternative for None of the above.
• We must identify which director actually made this particular film.

Concept / Approach:
The correct approach is to recall that The Man Who Knew Infinity is not a big budget Hollywood blockbuster by a superstar director but a more modest, focused biographical film directed by Matthew Brown. Christopher Nolan, Martin Scorsese, and Alfred Hitchcock are iconic directors, but none of them directed this 2015 biopic. Therefore, we should not be misled by more famous names and instead remember the relatively lesser known director associated with this specific project.

Step-by-Step Solution:
Step 1: Recall the movie The Man Who Knew Infinity, released around 2015, starring Dev Patel as Srinivasa Ramanujan and Jeremy Irons as G. H. Hardy. Step 2: Remember or look up that the director of this film is Matthew Brown. Step 3: Compare this with the filmography of Christopher Nolan, who directed movies like Inception and Interstellar, not this biopic. Step 4: Note that Martin Scorsese is known for films such as Taxi Driver and The Wolf of Wall Street, and Alfred Hitchcock for classic thrillers, again not this movie. Step 5: Select Matthew Brown as the correct answer.

Verification / Alternative check:
An alternative verification is to recognise that big directors like Nolan and Scorsese usually have highly publicised film lists, and a biopic on an Indian mathematician would likely be widely mentioned if they had directed it. Instead, film announcements and credits for The Man Who Knew Infinity consistently list Matthew Brown as director. Exam oriented magazines that cover important films related to India also repeat this fact. This repeated confirmation across sources verifies the answer.

Why Other Options Are Wrong:
Christopher Nolan: A renowned director, but never credited with directing The Man Who Knew Infinity. Martin Scorsese: Another legendary director, associated with crime dramas and character studies, not with this particular biopic. Alfred Hitchcock: A master of suspense from an earlier era; he passed away long before this film was made. None of the above: Incorrect because Matthew Brown is present in the options and is the actual director.

Common Pitfalls:
Students may be tempted to choose a more famous name such as Christopher Nolan simply because they recognise him, especially if they have not specifically noted the director of this film. Another pitfall is assuming that a high quality biopic must be associated with a very well known director. To avoid such errors, candidates should make brief notes on key films related to Indian scientists, sportspersons, and historical figures along with their directors and release years.

Final Answer:
The film \"The Man Who Knew Infinity\" was directed by Matthew Brown.