You will be given a definition of a task first, then some input of the task.
In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Question: How old was Lord Binning's father-in-law when he died? Passage:Lord Haddington was succeeded accordingly by his second son Thomas, the sixth Earl. He obtained a new charter of the earldom. He sat in the House of Lords as a Scottish Representative Peer from 1716 to 1735 and served as Lord-Lieutenant of Haddingtonshire from 1716 to 1735. He was also appointed Hereditary Keeper of Holyrood Palace. His eldest son Charles Hamilton, Lord Binning, married Rachel (died 1773), daughter of George Baillie, of Mellerstain House and Jerviswood. Through this marriage Mellerstein House and the Jerviswood estate came into the Hamilton family. Lord Binning predeceased his father. Lord Haddington was therefore succeeded by his grandson, Thomas the seventh Earl (the eldest son of Lord Binning), who married Mary Lloyd, nee Holt (great-niece of Sir John Holt, Lord Chief Justice 1689-1709). On his death the titles passed to his son Charles, the eighth Earl. He was a Scottish Representative Peer from 1807 to 1812 and Lord-Lieutenant of Haddingtonshire from 1804 to 1823. He was succeeded by his son, the ninth Earl. He was a Tory politician and served as Lord-Lieutenant of Ireland from 1834 to 1835 and as First Lord of the Admiralty (with a seat in the cabinet) from 1841 to 1846. In 1827, one year before he succeeded his father in the earldom, he was created Baron Melros, of Tyninghame in the County of Haddington, in the Peerage of the United Kingdom.
Links: a. Lord Lieutenant of Ireland b. House of Lords c. Holyrood Palace d. George Baillie
Output:
d