Woman of 30-years with Raynaud's phenomenon, polyahritis, dysphagia of 5-years and mild Sclerodactyl, blood showing Anti-centromere antibody positive, the likely cause is: (A) CREST, (B) Mixed connective tissue disorder, (C) SLE, (D) Rheumatoid ahritis
Answer is A. Ans. is 'a' i.e., CREST