Question - What will be the time in Sao Luis, Brazil (Longitude 45o w) when it is noon in London (Longitude 0)?

What will be the time in Sao Luis, Brazil (Longitude 45o w) when it is noon in London (Longitude 0)?  

A) 10.00pm 

B) 10.00am 

C) 9.00am 

D) 7.20am

Answer: 

C) 9.00am