What was the operational name of the series of tests that included Britian’s first successful detonation of a Hydrogen bomb on November 8, 1957?

What was the operational name of the series of tests that included Britian’s first successful detonation of a Hydrogen bomb on November 8, 1957?

Operation Sunbeam
Operation Grapple
Operation Hurricane
Operation Mosaic
Operation Trinity

Correct Answer: Operation Grapple