The Three Orders

What do you mean by Three Orders?

The three largest States of India in order of area are :

The three phases of the uterine cycle in order are

Decreasing order of basicity of the three isomers of nitro aniline is:

The order of the three layers of cells in the retina of human eye from inside to outside is

10 grams of each O_(2),N_(2) and Cl_(2) are kept in three bottles. The correct order of arrangement of bottles containing decreasing number of Molecules.

If the last four letters of the word 'CONCENTRATION' are written in reverse order followed by next two in the reverse order and next three in the reverse order and then followed by the first four in the reverse order, counting from the end which letter would be eighth in the new arrangement?