Coma = a prolonged state of deep unconsciousness caused ,especially by severe injury or illness.

• After the accident, she went into a coma.
• The road crash  left him in a coma.
• He’s alive, but he’s been in a coma for a week.
• When she woke up from coma , but she couldn’t speak or recognize her own children.
• He was brought to hospital in a comatose state. ( comatose – (adjective)= in an unconscious state.

Comma = a punctuation mark (,).

• Johny, Sreekand, Abdulla , Venu, and Saju participated in the competition.