XYZ, ABC, UVW, DEF, RST, GHI,_ ? 

Direction: In each of the following questions, find out which of the letter series follows the given rule.

The group of letters should not contain more than two vowels.

Pointing towards a girl Rama said that she is only child of my uncle’s father’s only sister’s daughter. Then how is Rama related to that girl?

In the given figure, which number presents steel bottles which are caps?

If “@” denotes “added to”, “#” denotes “multiplied by”, “®” denotes “divided by” and “%” denotes “subtracted from”, then which of the following equation is true?

Direction: In each of the following questions, four words have been given, out of which three are alike in some manner and the fourth one is different. Choose out the odd one.

If HONESTY is written as ABCXZDQ, how can TONY be written in that code? 

Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
aba _ baca _ ba _ bacaabac _ aca