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In the following questions, the symbols δ, $, *, @ and are used with the following meanings as illustrated below:

'P $ Q' means 'P is neither equal to nor greater than Q'.

'P Q' means 'P is neither equal to nor smaller than Q'

'P δ Q' means 'P is neither greater than nor smaller than Q.

'P @ Q' means 'P is not smaller than Q'

'P * Q' means 'P is not greater than Q'.

In each question three statements showing relationship have been given, which are followed by three conclusions I, II and III. Assuming that the given statements are true, find out which conclusion(s) is/are definitely true?

Statements:

M @ D, D δ K, K R

Conclusions:

I. R $ M

II. K δ M

III. K $ M