Anti RO antibodies are seen in -
Subacute cutaneous lupus
Myasthenia gravis
Systemic sclerosis
Mixed connective tissue disorder
Ans. is 'a' i.e., Subacute cutaneous lupus Anti-RNP SS-A (Ro), SS-B (La) are seen in neonatal lupus with congenital hea block and in subacute cutaneous lupus.These antibodies are associated with decreased risk of lupus nephritis.