Consider the following statements
During the third stage of tool-wear, rapid deterioration of tool edge takes place because
(a) Flank wear is only marginal
(b) Flank wear is large
(c) Temperature of the tool increases gradually
(d) Temperature of the tool increases drastically
Which of the statements given above are correct?
(a) 1 & 3 (b) 2 & 4
(c) 1 & 4 (d) 2 & 3