Today David is twice as old as Sam and Sam is 3 years younger than Dravid. If David, Sam, and Dravid are all alive 4 years from today, which of the following must be true on that day.
I. David is twice as old as Sam
II. Sam is 3 years younger than Dravid
III. David is older than Dravid
Options
A) II
B) I, II & III
C) III
D) I
E) I,II
Say Dravid age is 10   Sam age is 7   David age is 14   After 4 years   Dravid age is 14   Sam age is 11   David age is 28   i.e ) after 4 years   Sam is 3 years younger than David   David is twice as old as Sam   David is older than Dravid   Answer : I, II &amp; III
<result>B</result>
Today David is twice as old as Sam and Sam is 3 years younger than Dravid. If David, Sam, and Dravid are all alive 4 years from today, which of the following must be true on that day.
I. David is twice as old as Sam
II. Sam is 3 years younger than Dravid
III. David is older than Dravid