How milk is pasteurised?

Options

A. By heating it at `100^@`C for 15 min or at `90^@`C for 5 min
B. By heating it at `100^@`C for 15 mln or at `90^@`C for 32 min
C. By heating It at `71^@`C for 15 mln or at 62°C for 5 sec
D. By heating it at `71^@`C for 15 s or at `62^@`C for 32 min

Answer

D