/\ABC ~/\PQR.If AM and PN are altitude...

`/_\ABC ~/_\PQR`.If AM and PN are altitudes of `/_\ABC and /_\PQR `respectively and `AB^(2)`: `PQ^(2)`=4:9, then AM:PN =
(a) 16:81
(b) 4:9
(c) 3:2
(d) 2:3

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