Which letter-cluster will replace the question mark (?) to complete the given series?

LE, OJ, UO, DT,?

Direction :   Study the following information carefully and answer the given questions.
 Six people M, N, O, P, Q and R, stay on different floors of a six-story building (the ground floor is numbered as floor 1 and the top floor is numbered as floor 6). Each of them is in a different profession, via Singer, Dancer, Physician, Teacher, Choreographer and Manager
 P is a Physician but stays neither on floor 2 nor on floor 5. N is neither a Teacher nor a Choreographer but stays on floor 6. The Choreographer doesn’t stay below the floors of the Teacher but stays below the floor of the Dancer. The Manager stays either on floor 1 or on floor 4. Q doesn’t stay on an odd-numbered floor. M, who stays on floor 4, is either a Choreographer or a Teacher. Either O or R is a Dancer. 

Who stays on floor 3? 

Directions: Study the following information carefully and answer the questions that follow:

Six persons P, Q, R, S, T and U were born in three different months May, September and November, on two different dates- 9 and 16 not necessarily in the same order. P was born after R but not on the same date as that of R. Number of persons born before S is equal to the number of persons born after T. Q and U were born in the same month. T was born in a month having even number of days. Two persons were born between R and T.

Who was born on 16th November?

Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
 8 : 32 :: 12 : 72 :: 18 : ? 

Direction: Study the following data carefully and answer the questions accordingly.
There are seven members in a family with only three male members and two married couples. Z is the grandmother of L. O is married to S. O is the daughter-in-law of M. C is a sibling of L and M is the grandfather of C. U is the brother of M.

How C is related to S?

Out of the following five figures, four are alike in some manner and differs from these in the manner. select the odd figure.   

Question figure.

Arrange the given words in the sequence in which they occur in the dictionary.
 1. Wage
 2. Waist
 3. Waste
 4. West
 5. Wave

Select the option that represents the correct order of the given words as they would appear in an English dictionary.
 1. Negotiation
 2. Negate
 3. Networking
 4. Negligible
 5. Newspaper