Painless gross hematuria occurs in ?

Ans. is 'a' i.e., Renal cell carcinoma Hematuria without other symptoms (silent hematuria) must be regarded as a symptom of tumor of the bladder or kidney until proved otherwise." - Smith's Urology Among the given causes Renal Cell Carcinoma & Wilm's tumor, both can cause gross, painless hematuria. RCC being a much more common cause is the option of choice.