Correct answer is (c) 6.67 mA
The best explanation: To obtain an approximate answer, under saturation the BJT is ON and hence acts as a short circuit. However, ideally a drop exists for the transistor which is a fixed value. For an exact answer, if the BJT is a Silicon transistor, then drop VCE = 0.2V and current is 20-0.2/2.2=9.9 mA.