Solution
Option 1 -> While he did keep a low profile, the passage emphasizes his passion and perfectionism over business acumen; he forbade publicity and relied only on word of mouth, which isn't typical shrewd business management.
Option 2 -> The passage mentions he was self-taught and skilled at restoration, but there's no indication he guarded secrets or was strict about sharing his knowledge.
Option 3 -> He ran an antiquarian bookshop, so selling was his business; before death, he "quietly sold his collection to a longstanding customer, ensuring the books were preserved" - this was thoughtful planning, not reluctance.
Option 4 -> The passage clearly shows he was reclusive ("kept a low profile, preferring solitude," forbade publicity, select customer base) while being deeply passionate (worked until his final day, "devotion to the art") and a perfectionist ("meticulous care," "self-taught bibliophile and a perfectionist," "restored broken editions to exceptional condition").
Hence, Option 4: a reclusive yet passionate perfectionist -> This perfectly captures Madhava Rao's character as someone who avoided publicity and preferred solitude, yet demonstrated unwavering dedication to book restoration and maintained exceptional standards in his work until his very last day -> correct