The correct option is C All are true
Statements given M@J means M>J
J$T means J>=T
TN means T=N
Conclusions
1. N#J means N<J , From statements given T=N and J>=T means J>=N, means N#J. This is True.
2. T%M means T<M. From statements given M>J, but J>=T, therefore, M>T. This is True
3. M@N means M>N. From statements given M>J, J>=T and T=N, thus M>N. This is True
Answer is Option D