The correct answer is magic spell.
A. magic spell
The correct answer is (A) Magic spell; words or syllables chanted or uttered to cast a magic spell. A chanting or uttering of such words. Magical ceremonies.
Incantation comes from Latin in- [in] + cantare [to sing, chant].
Examples of use:
- The medicine man accompanied each remedy with an incantation.
- The dancing and strange incantations made the ceremony memorable.