P, Q, R and S are to give lectures to an audience. The organizer can arrange the order of their presentation in :

P,Q,R and S are four males.P is the oldest in the group but he is not the poorest. R is the richest but not the eldest,Q is elder than S but he is not elder than P or R. P is richer than Q but he is not richer than S. How the four persons can be arranged indecreasing order of their age and money?

The correct basicity order of atoms p,q and r is :

P, Q R and S four places in the world as given in the following map. Arrange these places in increasing order of their biodiversity.

P, Q, R and S are four men. P is the oldest but not the poorest. R is the richest but not the oldest. Q is older than S but not than P or R. P is richer than Q but not than S. The four men can be ordered (descending) in respect of age and richness, respectively as: