In the following figure, square represents Doctor,

Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.

268 : 284 :: 429 : ?

Statements:

X < W ≤ F = Q ≥ P = T ≥O ≥ S = R

Conclusions:

I) Q > R

I) Q = R

Select the option that is related to first number in the same way third number is related to forth number.

26: ? :: 33: 1155

If 12 # 34 = 14 and 67 # 88 = 106, then 45 # 67 = ?

Select the option that is related to fourth letter-cluster in the same way second letter cluster is related to first letter-cluster.

RT : QU : : VX : ?