Out of the following who cannot file a complaint on behalf of an aggrieved person in the consumer courtg :

Neighbour of a deceased consumer

The correct answer is option (4) : Neighbour of a deceased consumer

As per Consumer Protection Act 2019, a neighbor of a deceased consumer does not have the legal standing to file a complaint on behalf of an aggrieved person in the consumer court.

The Act specified who can file a complaint, and  while a legal hair, a consumer, and a registered consumer association have the right to file a complaint, a neighbour of a deceased consumer does not have the legal authority to do so.