Q .     Let `T_r` be the `rth` term of an AP, for `r = 1,2,3.....`. if for some positive integers `m, n` we have `T_m = 1/n` and `T_n = 1/m`, then `T_(mn)` equals

JEE 1998
A

`1/(m+n)`

B

`1/m+1/n`

C

`1`

D

`1/(mn)`

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