21 is related to 147 following a certain logic. Following the same logic, 32 is related to 224. To which of the following is 52 related to, following the same logic ?

Correct option is B

 The given pattern:
21→147
32→224

Logic = second number = 7 × first number
Observing the relationship:
21×7=147
32×7=224
The pattern appears to be:
Now, applying the same logic to 52:
52×7=364
Thus, the correct answer is:
B) 364.