The given statement is
P > Q \geq R > S; R < T < U
P is greater than Q which is greater than or equal to R. Hence P is definitely greater than R. T is less than or equal to R and U is greater than T. Hence we cannot comment on the relationship between R and U. Thus, we cannot compare P and U. Hence I is not implied.
R is greater than S and T is greater than R. Hence T is definitely greater than S. Hence conclusion II is implied.

The given statement is
P < Q ≥ R > S ; Q ≤ T = U
R is less than or equal to Q and Q is less than or equal to T. Hence R is less than or equal to T. Moreover, T is equal to U. Thus R must be less than or equal to U. Hence I is implied.
P is less than Q and Q is less than or equal to T. Hence P is definitely less than T. Thus, conclusion II is also implied.

The given statement is
E > F ≤ G = H > I ; H > J ≥ K < L
E is greater than F and F is less than or equal to G which is equal to H. Hence E is definitely less than H. J is less than H and K in turn is less than J. Hence K must be less than H. Thus, we cannot compare E and K. Thus, I is not implied.
F is less than or equal to H and J is also less than H. Hence we cannot compare F and J. Hence, II is also not implied.

Given statement is A > B ≤ C < D ; C ≥ E > F > G
B is less than or equal to C and F is less than C. Hence we cannot compare B and F. Thus, I is not implied.
D is greater than C and C is greater than G. Hence D is definitely greater than G. Thus, conclusion II is implied.

Five words will change into
HOA IIP URY MEG QUT
Each and every word has at least one vowel in it.

Five words will change into
AOG PIH YRT GEL TUP
Hence, There are no meaningful words in newly formed words.

Five words will change into
OGA IHP RTY ELG UPT
RTY is the word in which letters are in alphabetical order

Letters of five words after arranging in alphabetical order becomes
AGO HIP RTY EGL PTU

3 letters changed in GOA.
0 letters changed in HIP.
2 letters changed in TRY.
3 letters changed in LEG.
2 letters changed in PUT.
Hence, positions of 10 letters changed in the given words.

Five words formed are
HPB IJQ USZ MFH QVU
Three vowels are present in them.

From sentences ii) and iv) the following two arrangements are possible:
I. A _ D _ _ II. _ _ D _ A
From sentence i) B and C are adjacent, thus E should be present between A and D. Thus, the arrangement becomes
I. A - E - D - B/C - C/B II. B/C - C/A - D - E - A
But from sentence iii) C is sitting to the right of E. Therefore only arrangement I is possible.
Thus, the possible arrangements are :
A - E - D - B - C and A - E - D - C - B
We can see that 2 combinations are possible in which different person is sitting on the left of C. Thus, the answer is cannot be determined.