BJP on Tuesday retained Garoth Assembly seat in Madhya Pradesh's Mandsaur district albeit with a reduced margin as compared to the 2013 elections. The by-election at the seat was necessitated due to the death of BJP MLA Rajesh Yadav following illness. BJP candidate Chander Singh Sisodia won the bypoll by defeating Congress' Subhash Kumar Sojatia with a margin of 12,945 votes, an election officer said.