<prompt> Spontaneous bleeding occurs when platelet count falls below:50,000mL40,000mL30,000mL20,000mL  <response>: d. 20,000mLRef: Wintrobes 13689In general, the risk of significant spontaneous hemorrhage increases gradually as the platelet count drops to 50 109L and is high at counts 5 109L. So among the options the best answer is 20,000mL. 