Drug-induced lupus antibodies are found in -: (A) Anti-histone antibody, (B) Anti-Rho, (C) Ds-DNA, (D) Anti-Sm
Answer is A. Drug-induced lupus erythematosus 

A lupus like syndrome may develop in patients receiving a variety of drugs,
Procainamide and hydralazine are the most common offenders,
Most patients do not have symptoms of lupus erythematosus.
Anti-ds DNA antibody is rare
There is an extremely high frequency of antihistone antibodies.
Although multiple organs may be affected by renal and CNS involvement, usually does not occur.