AB, DEF, HIJK, ? , STUVWX 

In the following question, select the related word pair from the given alternatives.
Train : Track : : ? : ?

In the given answer figures, select the answer figure which contains / is contained in the question figure given below.

Select the option in which the words share the same relationship as that shared by the given pair of words.
Bank : River :: ? : Sea

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

Sorrow: Death:: Happiness:? 

QAR, RAS, SAT, TAU, ? 

Find the odd word from the following:

In a certain code language, "CASIO"  is written as "3119915". How is "CITIZEN" written in that code language?