Question:
Which position did Donald Stewart hold in Apr, 1984?

Context:
 Donald Stewart holds the position of Member of the 46th Parliament of the United Kingdom from Feb, 1974 to Sep, 1974. 
 Donald Stewart holds the position of Member of the 49th Parliament of the United Kingdom from Jun, 1983 to May, 1987. 
 Donald Stewart holds the position of Member of the 45th Parliament of the United Kingdom from Jun, 1970 to Feb, 1974. 
 Donald Stewart holds the position of Member of the 48th Parliament of the United Kingdom from May, 1979 to May, 1983. 
 Donald Stewart holds the position of Member of the 47th Parliament of the United Kingdom from Oct, 1974 to Apr, 1979.

Answer:
Member of the 49th Parliament of the United Kingdom