Step 1: Question Clarification:
The inquiry seeks the identifier of the newspaper or publication that featured the poem "I Thakemon." This poem is of notable importance within Khasi literary works.
Step 2: Elaboration:
"I Thakemon" was a poem published in U Nongialam Khristan. This publication was instrumental in fostering Khasi writings and Christian literature, contributing to the widespread recognition of literary and ethical compositions during its operational period.
Step 3: Conclusive Answer:
The definitive response is (1) U Nongialam Khristan, as it was the publication responsible for the release of the poem "I Thakemon."