Correct Answer - b
`n=4`
`{:(n,l,n+1),(1,1","2(A","B),2","3),(2,1","2","3","(A","B","C),3","4","5),(3,1","2","3","4,4","5","6","7),(4,1","2","3","4","5,5","6","7","8):}`
`{:(l,m,),(1,-(1)/(2)","(1)/(2),implies3),(2,-1","0","+1,impliesB(3)),(3,-(3)/(2)","-(1)/(2)","(1)/(2)","+(3)/(2),impliesC(4)),(4,-2","-1","0","+1","+2,impliesD(4)),(5,-(5)/(2)","-(3)/(2)","-(1)/(2)","+(1)/(2)","+(3)/(2)","+(5)/(2),impliesE(6)):}`