Which of the following letter-clusters will replace the question mark (?) in the given series?
 PK, GT, XC, OL, ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

JI, LK, NM, ? 

Select the option figure which when placed in the blank space of the problem figure would complete the pattern.

Select the option that is related to the third number in the same way as the second number is related to the first number and the sixth number is related to the fifth number.
 30 : 48 :: 60 : ? :: 45 : 72

Five friends A, B, C, D and E are standing in a row facing south, but not necessarily in the same order. Only B is between A and E. C is immediate to the right of E and D is immediate to the left of A. On the basis of above information, find the statement which is definitely true? 

Direction: From the given alternatives select the word which cannot be formed using the letters of the given words.
"COMPETITION" 

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
9, 17, 44, 108, 233, ?

Read the following information carefully and answer the questions given below- 

Twelve people are sitting in two parallel rows containing six people each, in such a way that there is an equal distance between adjacent persons. In row-I Piyush, Qurashi, Ronit, Sameer, Tujuf and Vipul are seated and all of them are facing South. In row-2 Aaliya, Bebo, Coco, Devi, Elena and Fiyama are seated and all of them are facing North. Therefore, in the given seating arrangement each member seated in a row faces another member of the other row.

Sameer sits third to right of Qurashi. Either Sameer or Qurashi sits at an extreme end of the line. The one who faces Qurashi sits second to right of Elena. Two people sit between Bebo and Fiyama. Neither Bebo nor Fiyama sits at an extreme end of the line. The immediate neighbour of Bebo faces the person who sits third to left of Piyush. Ronit and Tujuf are immediate neighbours of each other. Coco sits second to the left of Aaliya. Tujuf does not face the immediate neighbours of Devi.

Which of the following is true regarding Tujuf ?