Question:
Which position did Richard Bethell, 1st Baron Westbury hold in Jan, 1840?

Context:
 Richard Bethell, 1st Baron Westbury holds the position of treasurer from Jan, 1848 to Jan, 1848. 
 Richard Bethell, 1st Baron Westbury holds the position of Member of the 18th Parliament of the United Kingdom from Apr, 1859 to Jun, 1861. 
 Richard Bethell, 1st Baron Westbury holds the position of Member of the 16th Parliament of the United Kingdom from Jul, 1852 to Mar, 1857. 
 Richard Bethell, 1st Baron Westbury holds the position of Queen's Counsel from Jan, 1840 to Jan, 1840. 
 Richard Bethell, 1st Baron Westbury holds the position of Member of the 17th Parliament of the United Kingdom from Mar, 1857 to Apr, 1859. 
 Richard Bethell, 1st Baron Westbury holds the position of Lord Chancellor from Jun, 1861 to Jul, 1865. 
 Richard Bethell, 1st Baron Westbury holds the position of Member of the 15th Parliament of the United Kingdom from Apr, 1851 to Jul, 1852.

Answer:
Queen's Counsel