The correct option is A 11025
Prime factorization of 1575:
5157553153633217
1575=5×5––––––×3×3––––––×7– In pair In pair Not in pair
So, in order to make it a perfect square, we need to multiply 1575 with 7.
Hence, the least multiple of 1575 which is a perfect square = 1575 × 7 = 11025.