Select the related word/letters/number from the given alternatives.

OFFICIAL : QHHKEKCN : : LANGUAGE : ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
o p _ o s _ t _ o _ p o _ i t e _ p p o _ i _ e 

A is son of B while B and C are the sisters to one another. D is the mother of C. If E is the son of D, which one of the following statements is correct?

Direction: Study the following information to answer the given questions.
In a certain code language:
“Team work is secret” is written as “4K@, 1M@, 16S#, 26T$”
“secret was that makes” is written as “4S%, 1T@, 20S&, 26T$”
“The common people is” is written as “1E%, 10N$, 23E$, 16S#”
“Which achieve uncommon results” is written as “4H&, 8E!, 2N*, 25S!”

Which of the following will be the code for “4S%, 1T@, 26T$”?

5, 54, 90, 115, 131, 140?

Study the following information carefully and answer the questions given below:

Twelve people are sitting in two parallel rows containing six people in such a way that there is an equal distance between adjacent persons. In Row I- A, B, Z, D, E and M are seated and all of them are facing north. In row II- P, K, R, S, T and G are seated and all of them are facing south. Therefore, in the given seating arrangement each member seated in a row faces opposite of another member of the other row. G sits third to the right of S. G sits opposite to M. D sits third to the right of Z. R sits opposite to Z. The one who is facing E sits third to the right of P. B and E do not sit at the extreme ends of the line. T is not an immediate neighbour of G and A is not an immediate neighbour of B. K does not face D.

Who amongst the following represents the people seating at the extreme ends of the rows? 

Pointing towards a boy, a lady said, "he is only son of my father’s wife only daughter”. How is the lady related to boy?

Direction : Study the following information and answer the given question .
* is sister of # . # is married to & . & is son of $ . * is the mother of @ . © is the father of α . © has only one son and only one daughter . α is the daughter of * . β is the son of # . 

How @ related to # ?