<prompt> Which causes raised angiotensin in blood -a Increased blood volumeb Raised cardiac outputc Decreased blood pressured Increased sympathetic toneabbccdac  <response>: Function of Renin is to convert Angiotensinogen to Angiotensin I. So whenever Renin secretion is increased, Angiotensin I level also increases. Factors which reduce GFR or reduce Na delivery to distal tubule causes Renin secretion. Reduced BP or increased sympathetic tone reduces GFR. 