Final answer:
Lewis Harold Bell Lasseter claimed to have found a gold reef in Central Australia in 1911, but did not make this claim publicly until 1930, which is the correct answer to the question.
Step-by-step explanation:
Lewis Harold Bell Lasseter, who became famous for his claim regarding a rich gold reef in Central Australia, asserted that he had found this reef in 1911. However, he did not make the claim publicly until later. The correct answer to when Lasseter claimed to have found the reef of gold named after him is 1930 (option c). This year marks when he started to gather interest and financial backing to search for the reef again, leading to what is known as Lasseter's Last Ride.