**Concept:** The question tests on the basics of Counting

**Solution:**

Take the 4 Math books as 1 unit, 6 Physics books as 1 unit and 2 chemistry books as 1 unit.

Externally, we can arrange these 3 units in 3! ways.

internally, the math books can be arranged in 4! ways, Physics in 6! ways and chemistry books in 2! ways.

Total Arrangements = 3! * 6! * 4! * 2!**Option B**