If 2 x 3 x 4 = 432 , 5 x 6 x 7 = 765 then 2 x 5 x 7=?

Correct option is B

Let's analyze the given examples:

1. 2×3×4=432
   Normally, 2×3×4=24, but the answer given is 432. Notice that 432 is like the digits of 4,3,2  in reverse order.

2. 5×6×7=765
   Normally, 5×6×7=210, but the answer given is 765, which is just the digits 7,6,5 written in descending order.

Observation: The answer is the three numbers written in descending order concatenated as digits.

So, for 2×5×7:

Write the digits in descending order: 7, 5, 2
Concatenate: 752

Answer: 752