Reasoning

All except Knee are parts of hand.

All except Morbid are synonyms of ‘deceit’.

All except Hydrazine are pesticides, while Hydrazine is a rocket fuel.

All except Camel have horns.

All except Telescope are audio devices.

All except Sucrose are enzymes, while sucrose is a type of sugar.

All except India are islands, while India is a peninsula.

All except Distress are adjectives, while Distress is a noun.