Two different tools A and B having nose radius of 0.6mm and 0.33mm respectively are used to machine C-45 steel employing fed rate of 0.2 mm/rev and 0.1mm/rev respectively. The tool that gives better finish and the value of ideal surface roughness are
(a) Tool A and 4.166 μm respectively
(b) Tool B and 3.78 μm respectively
(c) Tool A and 8.333 μm respectively
(d) Tool B and 8.33 μm respectively