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4.0g of argon gas has pressure P and tem...

4.0g of argon gas has pressure P and temperature TK in a vessel. On keeping the vessel at `50^@C` higher, 0.8g of argon was given out to maintain the pressure at P. The original temperature was ____`xx 10^(-2) K`. 

A

400K

B

150K

C

200 K

D

273 K

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