The answer is 336.
The sequence is a list of numbers that are each the product of the previous two numbers. So, the first number is 24, which is the product of 1 and 24. The second number is 60, which is the product of 24 and 3. The third number is 120, which is the product of 60 and 2. The fourth number is 210, which is the product of 120 and 3. The fifth number is 336, which is the product of 210 and 2.
Option A is incorrect because 300 is not the product of the previous two numbers in the sequence.
Option B is incorrect because 336 is the product of the previous two numbers in the sequence.
Option C is incorrect because 420 is not the product of the previous two numbers in the sequence.
Option D is incorrect because 525 is not the product of the previous two numbers in the sequence.