<prompt> A 35 year old lady complains dysphagia, Raynauds phenomenon, sclerodactyly. Investigations show antinuclear antibody. The likely diagnosis is ?Systemic lupus erythematosisSystemic sclerosisMixed connective tissue disorderRheumatoid ahritis  <response>: Ans. is b i.e., Systemic sclerosiso Dysphagia, Raynauds phenomenon, sclerodactyly in 35 years old lady suggest the diagnosis of systemic sclerosis see above explanations.I think option b needs some explanation here.Mixed connective tissue diseaseo Patients having the co-existence of features suggestive of SLE, polymyositis, Rheumatoid ahritis and systemic sclerosis. 