Which one of the following is correctly spelled word?

diaphragm

The correct answer is Option (1) → diaphragm

The correctly spelled word is diaphragm. The other words are misspelled.

Spelling Corrections for Other Options

• Option 2: The correct spelling is deteriorate (not detoriate).

• Option 3: The correct spelling is disciplinary (not disciplinery).

• Option 4: The correct spelling is deficiency (not defeciency).