Select the option that is related to the third number

If 15 & 4 # 25 = 35 and 50 # 5 & 7=15, then 12 & 6 # 32=?

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

Based on the numerical analogy given, choose the correct answer from the options given below:

16:56 32:?

Select the option that is related to the fourth number in the same way as the first number is related to the second number.

12 : 96 :: ? : 800

Given set:  278, 257, 365

Statements:

X < W ≤ F = Q ≥ P = T ≥O ≥ S = R

Conclusions:

I) Q > R

I) Q = R