Find the missing numbers from given figure?

Direction: In the following question, select the related letters from the given alternatives. 

QDXM : SFYN :: UIOZ : ?

In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.

Statement I: No spaghetti are noodles
Statement II: Some food are spaghetti
Conclusion I: All noodles are food
Conclusion II: All food are noodles

Seven persons A, B, C, D, E, F and G are standing in a row facing the same direction. B is second to the right of C. B is extreme end of the row. Two persons between A and D. D is immediate left of C. Who is 4th from the right end?

Twenty students are standing in a straight-line facing North. Rina is standing sixth from the left end. There are only three students between Rina and Shweta. Radha is standing exactly between Shweta and Rina. Tina is standing sixth to the right of Radha. Anita is standing fourth from the right end of the line. There are more than four students between Rina and Tina.
How many people are standing between Anita and Tina?

From the given options, find the number that comes in place of the question mark.

Find the missing number