The R and S configuration for each stereogenic centre in this from top to bottom is :
A
R, R, R
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B
R, S, S
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C
R, S, R
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D
S, S, R
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Solution
The correct option is D R, S, R From priority group arrangements we can see that carbon 1 has R, carbon 2 has S and carbon 3 has R configuration (opposite to what we get, as lowest priority group H is on horizontal line).