Dripping Candle Wax lesion on spine ?

Ans. is 'd' i.e., Melorheostosis Melorheostosis Melorheostosis is a medical developmental disorder and mesenchymal dysplasia in which the bony coex widens and becomes hyperdense in a sclerotomal distribution. Caused by a mutation of the LEMD3gene. Can be detected by radiograph due to thickening of bony coex resembling "dripping candle wax". Disorder tends to be unilateral and monoostotic, with only one limb typically involved. Cases with involvement of multiple limbs, ribs, and bones in the spine have also been repoed. There are no repoed cases of involvement of skull or facial bones. Melorheostosis can be associated with pain, physical deformity, skin and circulation problems, contractures, and functional limitation. It is also associated with a benign inner ear dysplasia known as osteosclerosis.