Let R={(1,2),(3,4),(2,6.} and S={(4,3),(2,5),(6,6)} be a relation then R composite S=____.

• A. {(1,5),(3,3),(2,6)}
• B. {(1,5),(3,6),(2,5)}
• C. {(4,4),(2,5),(3,3)}
• D. {(1,1),(3,3),(2,2)}