Alexander became rich _________.

The correct answer is Option D (by receiving share in a legacy).

Key Points:
• Core Language Concept Tested: The question primarily tests the candidate's ability to directly retrieve factual information outlining cause-and-effect relationships from a reading comprehension passage.
• Why the Correct Option is Right: The official answer key marks option 4 as correct. The passage explicitly states: "In 1901, he received a share in a legacy which made it possible for him to return to school. He decided to study medicine." The sudden influx of money (becoming rich enough to afford higher education after previously being forced to work for economic reasons) is directly attributed to receiving this "share in a legacy."
• Common Exam Traps and Pitfalls: MPSC includes options that represent true statements from the text but are not the cause of the wealth. For instance, he did work in a shipping company (option 1), and his brother did become an occultist (option 2), but neither of these events made him rich. Candidates often select an option just because they remember reading those words in the text.
• Elimination of Incorrect Options: Working in the shipping company was out of economic necessity, not a source of wealth. The brother's success did not directly enrich Alexander according to the text. Studying medicine was a *result* of becoming financially secure, not the cause of it. Thus, by chronological and causal deduction, we arrive safely at the correct choice.
• Preparation Strategy: Differentiate between chronological events and causal events when answering 'why' or 'how' questions in reading comprehension.
• Key Takeaway: Remember: Always link the specific outcome asked in the question (becoming rich) to its direct cause stated in the text (receiving a legacy).