1.

Match the following

Answer»

<P>`{:(P,Q,R,S),(1,2,4,3):}`
`{:(P,Q,R,S),(2,1,4,3):}`
`{:(P,Q,R,S),(4,1,3,2):}`
`{:(P,Q,R,S),(4,3,2,1):}`

ANSWER :B


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