Oxygen discovered by:

A. -

B. J.S priestley

C. -
D. -

Occurrence: Assistant Director TEPA BS-17 (13-07-2025) (2025)

Oxygen discovered by: | J.S priestley | CSS, PMS, PPSC, FPSC, KPPSC, SPSC, ISSB and NTS Past Papers | Pakistan's Largest Online Past Papers Database

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