Which of the following cannot file a complaint in the consumer courts?

Wife of the consumer

The correct answer is option 2- Wife of the consumer.

Wife of the consumer cannot file a complaint in the consumer courts.

A complaint before the appropriate consumer forum can be made by:
(i) Any consumer;
(ii) Any registered consumers’ association;
(iii) The Central Government or any State Government
(iv) One or more consumers, on behalf of numerous consumers having the same interest; and
(v) A legal heir or representative of a deceased consumer.