Question:
Which position did John Colville, 1st Baron Clydesmuir hold in Nov, 1938?

Context:
 John Colville, 1st Baron Clydesmuir holds the position of Financial Secretary to the Treasury from Oct, 1936 to Jan, 1938. 
 John Colville, 1st Baron Clydesmuir holds the position of Member of the 35th Parliament of the United Kingdom from May, 1929 to Oct, 1931. 
 John Colville, 1st Baron Clydesmuir holds the position of Secretary of State for Scotland from May, 1938 to May, 1940. 
 John Colville, 1st Baron Clydesmuir holds the position of Member of the 37th Parliament of the United Kingdom from Nov, 1935 to Jan, 1943. 
 John Colville, 1st Baron Clydesmuir holds the position of Member of the 36th Parliament of the United Kingdom from Oct, 1931 to Oct, 1935.

Answer:
Secretary of State for Scotland