If $(i)$ $P$ is taller than $Q$,$(ii)$ $R$ is shorter than $P$,$(iii)$ $S$ is taller than $T$ but shorter than $Q$,then who among them is the tallest?

There is a group of five persons $A, B, C, D$ and $E$. In the group,there are a Professor of Philosophy,a Professor of Psychology,and a Professor of Economics. $A$ and $D$ are ladies who have no specialization in any subject and are unmarried. No lady is a philosopher or an economist. There is a married couple in the group of which $E$ is the husband. $B$ is the brother of $C$ and is neither a psychologist nor an economist. Who is the Professor of Economics?

Five friends $A, B, C, D$ and $E$ are sitting on a bench.
$1.$ $A$ is sitting next to $B$.
$2.$ $C$ is sitting next to $D$.
$3.$ $D$ is not sitting with $E$.
$4.$ $E$ is on the left end of the bench.
$5.$ $C$ is on the second position from the right.
$6.$ $A$ is on the right side of $B$ and to the right side of $E$.
$7.$ $A$ and $C$ are sitting together.
Where is $A$ sitting?

$(i)$ There are six friends $A, B, C, D, E$ and $F$.
$(ii)$ Each one is proficient in one of the games,namely Badminton,Volleyball,Cricket,Hockey,Tennis and Polo.
$(iii)$ Each owns a different coloured car,namely yellow,green,black,white,blue and red.
$(iv)$ $C$ does not play either Tennis or Hockey and owns neither blue nor yellow coloured car.
$(v)$ $D$ plays Polo and owns a yellow coloured car.
$(vi)$ $E$ owns a white car and plays Badminton.
$(vii)$ $B$ does not play Tennis,he owns a red coloured car.
$(viii)$ $A$ plays Cricket and owns a black car.
Which of the following combinations of colour of car and game played is not correct?

In a school,there were five teachers. $A$ and $B$ were teaching Hindi and English. $C$ and $B$ were teaching English and Geography. $D$ and $A$ were teaching Mathematics and Hindi. $E$ and $B$ were teaching History and French. Who among the teachers was teaching less than two subjects?

$(i)$ There are seven books,one each on Psychology,Hindi,English,Sociology,Economics,Education,and Accountancy,lying on a table one above the other.
$(ii)$ Sociology is on the top of all the books.
$(iii)$ Accountancy is immediately below Education,which is immediately below Sociology.
$(iv)$ Economics is immediately above Psychology but not in the middle.
$(v)$ Hindi is immediately below Psychology.
Economics is between which of the following books?